Feeling goofy - post your favorite lame jokes here

[scaeagles]

Two atoms are walking down the street.

First atom: "Damn, I lost and electron!"
Second atom: "Are you sure?"
First atom: "Yes, I'm positive."

And a totally tasteless knock knock joke:

Spoiler:

knock, knock
who's there?
little boy blue
Little boy blue who?
Michael Jackson