http://www.msxnet.org/humour/terror_alert
With signs like these, alot of people are gonna die of confusion.
Sneakily edits in: sorry if its ancient [yeah it is]
[img]http://www.msxnet.org/humour/image16.png[/img]
"
If you are trapped under falling debris, conserve oxygen by not farting."
Also look here:
http://bitterfilms.com/anesthetics-teeth.html