Max Hardcore and Jesse hands down. It was up on a tube site before and people were repelled by it. No cameramen, just still cams. He looks like he is losing his fucking mind...

http://www.pornhub.com/view_video.php?viewkey=1361727183
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"I'll never forget the moment during the lovely Alyssa Allure's scene in 'American Bukkake' where the fellow got out of his wheel chair to ejaculate on her face. It was grotesque but had a certain frisson." -Sock