From the Goofus and Gallant school of safety instruction, we have Dopey Dan and Safety Sam. Note how Dopey Dan appears to be bleeding from the mouth and nose; that was probably his natural state. Again with the quotation marks: don't ride "without hands." Is that a slang term for riding without, you know, hands? Long shot, yes, but it's possible.

Kids might have wondered why Juicy Fruit was lecturing them all the time.

The artist looks familiar - I swear he drew for Mad Magazine, but I don't know who it is. It's driving me nuts.