For some unknown reason, "Jackass" star Steve-O was a roaster at  "Comedy Central Roast of Charlie Sheen." And Steve-O wisely played to his strengths which, of course, means hurting himself.

Check out hiw awesome shiner and the video to go with it....JACKASS!!

For further unknown reasons, Steve-O ran face first into the outstretched fist of former heavyweight champion Mike Tyson who, for additional unknown reasons, was also a roaster. After a less than graceful dive into the aforementioned fist, Steve-O stood up and instantly diagnosed his own malady. Steve-O took to his website to explain his actions:

"I told Charlie Sheen that I was so grateful to be a part of his roast that I was going to attempt to get a black eye from Mike Tyson."