Not only is it Hallowe’en today, but it is also National Knock Knock Joke Day.  What a joyous cause to celebrate!  Here’s a un-knock knock joke:

Knock, knock.

Come on in; the door’s open.

And another one, just to make the celebration last longer.

Knock, knock.

Who’s there?

Ya.

Ya who?

I’m excited to see you too.

Happy Knock Knock Joke Day to all.