Here's a guy you don't ever want to pick a fight with: Nikolay "Russian Giant" Valuev, who, at 7 feet tall, absolutely towers over his opponents (before pummelling them to oblivion).
Nikolay also happens to be the heaviest and tallest heavyweight boxing champion in history.
Links: Nikolay's website (check out the video) | Wikipedia Entry - Thanks Dave Thornton!
I wouldn't mind running into him in a dark alley....
if it were for a romp!
(ok, feel bad saying that 'casue of family, but Damn!)
Sex between them must be like trying to push a baseball bat through a keyhole.