Yeah, that's Kavok (played by Robert O'Reilly) from A Klingon Challenge. http://en.memory-alpha.org/wiki/Star_Trek:_The_Next_Generation_-_A_Klingon_Challenge
GeneralGrin uses footage from this game with hilarious results (as usual) in his TNG: Recut episodes on YouTube: http://www.youtube.com/watch?v=qGIIxbhTV2k&feature=results_video