Q: Why couldn't the lifeguard save the hippie?

Q: Why couldn't the lifeguard save the hippie?
A: He was too far out, man.

This is a pun based on a colloquial phrase that hippies are reported to say. The phrase "Far out" indicates that something is excellent, but when someone is far out into the ocean, that just means that they are not close to the shore, and therefore too far away for the lifeguard to save them.