Sheldon and Raj Trestling, cheered on by Howard and Leonard.
Trestling is a game that, according to Howard, "combines the physical strength of arm wrestling with the mental agility of "Tetris".
The game was played by Sheldon and Raj in the Season 1 episode The Peanut Reaction. In the game, players must play a game of Tetris with one hand while wresting with the other. The winner is the first to beat the other in either. The game played was declared a draw, as Penny asked them to stop causing a disturbance since they were in The Cheesecake Factory.