http://www.humorasylum.com
The fun thing is that these pictures are so ambiguous they could mean anything! Here are a few interpretations

If you lose a contact lens during a chemical attack, do not stop to look for it.

If you have set yourself on fire, do not run

Do not drive a station wagons if a power pole is protruding from the hood.

The proper way to eliminate smallpox is to wash with soap, water and at least one(1) armless hand.