That's not funny.
I don't know. They just keep going on and on about how the last one broke.
When this gets 500 upvotes, I'll tell you the answer.
THAT'S NOT FUNNY!
Are you kidding They won't even change a five dollar bill."
Inserting a rod into the reactor turns it off.
When she starts her sentence with "A man once told me" .
If she's only wearing one sock. (This joke brought to you courtesy the homeless guy outside my local 7-11.) Edit: tweaked the punchline.