My wife pointed me to this animation a couple of days ago:
http://en.wikipedia.org/wiki/File:%22Donkey_punch%22_(animated).gif
It is/was included (there is currently edit-warring about it) in the Donkey
punch article in the English Wikipedia:
http://en.wikipedia.org/wiki/Donkey_punch
This has been one of the most viewed articles in Wikipedia of late, with
nearly 400,000 page views this last month.
http://stats.grok.se/en/latest30/Donkey_punch
Views?