OMG, my Mac had a Kernel panic

[Feek]

I thought these didn't happen, Mac's don't crash, right?!

Thu Oct  2 21:25:21 2008
panic(cpu 0 caller 0x00193077): "pmap_flush_tlbs() timeout: " "cpu(s) failing to respond to interrupts, pmap=0x536500 cpus_to_respond=0x2"@/SourceCache/xnu/xnu-1228.7.58/osfmk/i386/pmap.c:4580
Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
0x87cd3a88 : 0x12b0fa (0x459234 0x87cd3abc 0x133243 0x0) 
0x87cd3ad8 : 0x193077 (0x45f3a4 0x536500 0x2 0x19d8f8) 
0x87cd3b48 : 0x19339d (0x53d418 0x1 0x0 0x1e0f17a8) 
0x87cd3bf8 : 0x195806 (0x536500 0x87c09000 0x0 0xfec3e048) 
0x87cd3c58 : 0x169e6f (0x536500 0x87c09000 0x0 0x87c0d000) 
0x87cd3d78 : 0x16a437 (0x87c0d000 0x0 0x1 0x0) 
0x87cd3db8 : 0x164699 (0x1cdff78 0x87c09000 0x0 0x87c0d000) 
0x87cd3df8 : 0x38f8eb (0x1cdff78 0x87c09000 0x4000 0xfcfa774) 
0x87cd3e18 : 0x38fa8c (0xf928870 0x400 0x87cd3e48 0x1f1eaf) 
0x87cd3e48 : 0x38faee (0xeb7e778 0x212 0x87cd3e78 0x3e8c57) 
0x87cd3e78 : 0x36751b (0x178de000 0x87cd3ec8 0x200000 0xe7f8658) 
0x87cd3ee8 : 0x36790c (0xf0760a0 0x178de000 0xeb7e720 0x1a7efc) 
0x87cd3f28 : 0x3679c8 (0x0 0x19 0x87cd3f5c 0x1) 
0x87cd3f78 : 0x3ddd6e (0xeb7e720 0x1ab41380 0x1ab413c4 0x1b68bcc4) 
0x87cd3fc8 : 0x19f3b3 (0x1b6639e0 0x0 0x1a20b5 0x1b6639e0) 
No mapping exists for frame pointer
Backtrace terminated-invalid frame pointer 0xb039deb8

BSD process name corresponding to current thread: DirectoryService

Mac OS version:
9F33

Kernel version:
Darwin Kernel Version 9.5.0: Wed Sep  3 11:29:43 PDT 2008; root:xnu-1228.7.58~1/RELEASE_I386
System model name: MacPro3,1 (Mac-F42C88C8)

What happened? Should I call the police?