I participate in one sport. I fly model airplanes. A guy I know, went flying RC by himself, one day. After a few hours, he returned, saying he needed a golf ball retriever to get his airplane down from a tree.
I said: "A golf ball retriever?"
He said: Yes, that's what we used to get golf balls, when we lose them.
I said: "So, golf balls get stuck in trees, too?