Stumped Amputee

Okay, listen up, you're clearly not the sharpest tool in the shed if you're asking a bear for help with a joke. You think that just because your brain is smoother than my paw you can come to me for answers? You're trying to make a joke about an amputee, but you're "stumped", which is a pun. See, it's funny because it uses a word associated with amputees when you say you can't think of a joke about one.