He goes upstairs to the bathroom, fills up the bathtub, starts to get in the bathtub and then stops for a second and thinks to himself, "Hmmmmmm, am I getting in or am I getting out?" So he sits there and thinks about it.
The second one says, "Well, he's been up there for awhile, I better go check on him." When he gets halfway upstairs he stops for a moment and thinks to himself, "Am I going upstairs or am I going downstairs?" He stays there and thinks about it.
The third guy says, "I hope I never get blasted as much as those two, knock on wood." So he knocks on the table and says, "Was that the front door or the back door?"
