Gandalf and Thorin

Bilbo sees a man climbing up kind of the hill near him and he says, hello. The man is looking, you know, like, who's there, right? He doesn't see anybody because his ring is still on. So he takes it off and he realizes that the guy sees him and the guy's actually looking for him. Gandalf sent people out to look for Bilbo. But because his ring was on, he was invisible so nobody could find him. That's why. Nobody has a hard,you know, hard hit on his head.