Best Knock Knock Joke!

I stumbled upon a knock knock joke that wasn't like any others that I've read before. This one made me laugh. And no not because of the stupidity of it, like the bananas/orange joke. This one had depth, which most knock knock jokes do not have. Although I will say Rowan Atkinson (Mr. Bean) once told a knock knock joke that was particularly good dealing with Death. But this joke, was a different breed of knock knock joke. Thank you facebook page: Jokes.

Three brothers age 92, 94, and 96 live in a house together.

One night the 96 year old draws a bath, puts his foot in and pauses. he yells down the stairs, "Was I getting in or out of the bath?"

The 94 year old yells back, "I don't know, I'll come up and see." He starts up the stairs and pauses, then he yells, "Was I going up the stairs or coming down?"

The 02 year old was sitting at the kitchen table having coffee listening to his brothers. He shakes his head and says, "I sure hope I never get that forgetful." he knocks on wood for good luck. he then yells, "I'll come up and help both of you as soon as I see who's at the door."