Knock Knock... Knock Knock. Who's There? Hitler. Hitler Who? YES! The time machine was a success! Knock Knock. Who's There? David Hasslehoff. David Hasslehoff, who? YES, TWO BIRDS ONE STONE! Now i'm not saying that David Hasslehoff is a nazi, but he is a charismatic leader who's led the german people astray. -&y (by me! go try it on someone!)