This is hilarious, forwarded by a friend who I get a lot of funnies from, I was in tears of laughter watching this. The funniest part is towards the end, I was sort of expecting what was to come (no pun intended) but I can't believe these exercisers are really for sale.
http://www.youtube.com/watch?v=EMs-4fUZd-k
http://www.youtube.com/watch?v=EMs-4fUZd-k