I chanced upon this earlier...we've all been there.
Brilliantly done I thought:
http://www.youtube.com/watch?v=h9Ep...F86372528&playnext=1&playnext_from=PL&index=1
The only thing that has ever had me literally in stiches was the trampoline at school.
This made me laugh though;
http://www.youtube.com/watch?v=xxA7hFIOFBs