diff -urN /usr/src/sys/conf/files src/sys/conf/files
--- /usr/src/sys/conf/files	Fri Aug 19 19:36:24 2005
+++ src/sys/conf/files	Mon Aug 22 23:19:27 2005
@@ -1240,6 +1240,7 @@
 kern/subr_blist.c		standard
 kern/subr_bus.c			standard
 kern/subr_clock.c		optional genclock
+kern/subr_cow.c			standard
 kern/subr_devstat.c		standard
 kern/subr_disk.c		standard
 kern/subr_eventhandler.c	standard
diff -urN /usr/src/sys/kern/kern_shutdown.c src/sys/kern/kern_shutdown.c
--- /usr/src/sys/kern/kern_shutdown.c	Tue Apr 12 07:45:58 2005
+++ src/sys/kern/kern_shutdown.c	Mon Aug 22 23:24:38 2005
@@ -491,6 +491,7 @@
 	int bootopt, newpanic;
 	va_list ap;
 	static char buf[256];
+	char tmpbuf[256];
 
 #ifdef SMP
 	/*
@@ -519,11 +520,13 @@
 	if (newpanic) {
 		(void)vsnprintf(buf, sizeof(buf), fmt, ap);
 		panicstr = buf;
-		printf("panic: %s\n", buf);
+		printf(" ");
+		cowsay(buf);
 	} else {
-		printf("panic: ");
-		vprintf(fmt, ap);
-		printf("\n");
+
+		(void)vsnprintf(tmpbuf, sizeof(tmpbuf), fmt, ap);
+		printf(" ");
+		cowsay(tmpbuf);
 	}
 	va_end(ap);
 #ifdef SMP
diff -urN /usr/src/sys/kern/subr_cow.c src/sys/kern/subr_cow.c
--- /usr/src/sys/kern/subr_cow.c	Thu Jan  1 01:00:00 1970
+++ src/sys/kern/subr_cow.c	Mon Aug 22 23:32:37 2005
@@ -0,0 +1,136 @@
+/*-
+ * Copyright (c) Suleiman Souhlal <ssouhlal@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+
+const char cow[] = "\n        \\   ^__^\n"
+    "         \\  (oo)\\_______\n"
+    "            (__)\\       )\\/\\\n"
+    "                ||----w |\n"
+    "                ||     ||\n";
+
+const char sheep[] = "  \\\n"
+    "   \\n"
+    "       __\n"
+    "      UooU\\.'@@@@@@`.\n"
+    "      \\__/(@@@@@@@@@@)\n"
+    "           (@@@@@@@@)\n"
+    "           `YY~~~~YY'\n"
+    "            ||    ||\n";
+
+const char bunny[] = "  \\\n"
+    "   \\   \\n"
+    "        \\ /\\n"
+    "        ( )\n"
+    "      .( o ).\n";
+
+const char koala[] = "       ___\n" 
+    "     {~._.~}\n"
+    "      ( Y )\n"
+    "     ()~*~()\n"
+    "     (_)-(_)\n";
+
+const char beastie[] = "   \\         ,        ,\n"
+    "    \\       /(        )`\n"
+    "     \\      \\ \\___   / |\n"
+    "            /- _  `-/  '\n"
+    "           (/\\/ \\ \\   /\\\n"
+    "           / /   | `    \\\n"
+    "           O O   ) /    |\n"
+    "           `-^--'`<     '\n"
+    "          (_.)  _  )   /\n"
+    "           `.___/`    /\n"
+    "             `-----' /\n"
+    "<----.     __ / __   \\\n"
+    "<----|====O)))==) \\) /====\n"
+    "<----'    `--' `.__,' \\\n"
+    "             |        |\n"
+    "              \\       /\n"
+    "        ______( (_  / \\______\n"
+    "      ,'  ,-----'   |        \\\n"
+    "      `--{__________)        \\/\n";
+
+const char kitty[] = "       (\"`-'  '-/\") .___..--' ' \"`-._\n"
+    "         ` *_ *  )    `-.   (      ) .`-.__. `)\n"
+    "         (_Y_.) ' ._   )   `._` ;  `` -. .-'\n"
+    "      _.. `--'_..-_/   /--' _ .' ,4\n"
+    "   ( i l ),-''  ( l i),'  ( ( ! .-'\n";
+
+const char tuxstab[] = "   \\                     ,        ,\n"
+    "    \\                   /(        )`\n"
+    "     \\                  \\ \\___   / |\n"
+    "     \\                  /- _  `-/  '\n"
+    "     \\                 (/\\/ \\ \\   /\\\n"
+    "     \\                 / /   | `    \\\n"
+    "     \\                 O O   ) /    |\n"
+    "    \\                  `-^--'`<     '\n"
+    "     .--.             (_.)  _  )   /\n"
+    "    |o_o |             `.___/`    /\n"
+    "    |:_/ |              `-----' /\n"
+    "   //<- \\ \\----.     __ / __   \\\n"
+    "  (|  <- | )---|====O)))==) \\) /====\n"
+    " /'\\ <- _/`\\---'    `--' `.__,' \\\n"
+    " \\___)=(___/            |        |\n"
+    "                          \\       /\n"
+    "                    ______( (_  / \\______\n"
+    "                  ,'  ,-----'   |        \\\n"
+    "                  `--{__________)        \\/\n";
+
+const char stego[] = "\\                             .       .\n"
+    " \\                           / `.   .' \" \n"
+    "  \\                  .---.  <    > <    >  .---.\n"
+    "   \\                 |    \\  \\ - ~ ~ - /  /    |\n"
+    "         _____          ..-~             ~-..-~\n"
+    "        |     |   \\~~~\\.'                    `./~~~/\n"
+    "       ---------   \\__/                        \\__/\n"
+    "      .'  O    \\     /               /       \\  \" \n"
+    "     (_____,    `._.'               |         }  \\/~~~/\n"
+    "      `----.          /       }     |        /    \\__/\n"
+    "            `-.      |       /      |       /      `. ,~~|\n"
+    "                ~-.__|      /_ - ~ ^|      /- _      `..-'   \n"
+    "                     |     /        |     /     ~-.     `-. _  _  _\n"
+    "                     |_____|        |_____|         ~ - . _ _ _ _ _>\n";
+
+#define NUMCOWS 8 /* Must be a power of 2 */
+
+const char *cows[] = { cow, sheep, bunny, koala, beastie, kitty, tuxstab,
+    stego };
+
+void
+cowsay(char *msg)
+{
+	int i;
+
+	printf(" ");
+	for (i = 0; i < strlen(msg); i++)
+		printf("_");
+	printf("\n< %s >\n ", msg);
+	for (i = 0; i < strlen(msg); i++)
+		printf("-");
+	i = arc4random() & (NUMCOWS - 1);
+	printf(cows[i]);
+}
diff -urN /usr/src/sys/sys/systm.h src/sys/sys/systm.h
--- /usr/src/sys/sys/systm.h	Thu Apr 28 05:19:50 2005
+++ src/sys/sys/systm.h	Mon Aug 22 23:18:44 2005
@@ -124,6 +124,7 @@
 struct uio;
 struct _jmp_buf;
 
+void	cowsay(char *);
 int	setjmp(struct _jmp_buf *);
 void	longjmp(struct _jmp_buf *, int) __dead2;
 int	dumpstatus(vm_offset_t addr, off_t count);