Watch out for the cloth you are holding! It's going to be caught by the moving motor coupling.

Accidents can happen anytime. Notices like this make workers aware that things like this can happen if they are not careful.

It can be pretty dangerous if there are sharp objects or moving machinery around when this happens.

Be safe rather than sorry!

Once a combustible gas catches fire, it is going to spread very fast - so fast that it flashes.

He is training for the Olympics!

Make do with another subject and modify to suit.

Switch off before doing any electrical work!

Do it yourself tooth extraction in the absence of a dentist