A tinmen walks into a bar and the troll hits him with a table, this causes the
tincan to fold up so the merch/sabre/bard can JJ him and after that they think
that they might kill him. Fortunately Green Lantern was around so nothing like
that happened, and they only JJ'd him with the trio.
Of course, since this is supposed to be a bad joke, Magneto also appeared on
the scene. Or would have if the copyright infingement wouldn't have caught up
with me and forced me to discard that storyline.
So now we have a tinmen who is being JJ'd by a troll and a s/m/b and we're
supposed to tell a bad joke. So the joke is: What does Michael Jackson do in
an elevator? Push a button!
If you didn't catch it, you're very lucky, since it's bad even when it works.

-Metsän Pöllö

I didn\'t catch it at first but then I started thinking about it. Then I got it
and started wishing I hadn\'t bothered to think about it in the first place.

A word of warning to others: Don\'t bother to think about it... If you can.