This is something you don’t see everyday!
Well, in fact, a sign like this giving basic instructions in CPR is probably something you do see everyday, such as this sign I saw in a train station in France:
But what you don’t see everyday is the part of the sign giving instructions in the use of the Modified Silvester Method:
I’d never heard about this before – so I looked it up. It is not a version of CPR (which affects the movement of blood) but rather artificial respiration (getting the lungs to inflate and deflate). I am not sure if this method is actually taught or encouraged anymore, and the date on the sign points to its age: