Sojourner hard crash

Yesterday got Sojourner's (as a Thinkpad T60) first crash.
It was a mighty one, total freeze, no input at all, not thru Thinkpad's nipple, external USB mouse, keyboard nor trackpad.
Impossible to kill X Window, nor switching to a virtual console...
A hard reboot brought the lappie up once again with no apparent side effect.
Skimmed thru the logs, but found nothing at all.