O.K., I'm back, and lots of new captions have been posted. Contest No. 7 isn't over until midnight Tuesday, June 8th, so there's still plenty of time to come up with innovative stuff.
What a shame that I can't win this contest myself — while I was away I came up with two great captions, both on topics that haven't yet been covered by anyone else. I'll tell them to you when I declare the winner.