During the pool game montage, where Danny is sinking shot after shot, Jesse's wedding band repeatedly disappears and reappears on his left hand.
After Danny hits a second ball in the game of pool, the balls change positions on the table throughout different shots after Danny blows on the tip of the cue until the end of the game. However, when they are done playing, Danny says he sank 50 balls, which would indicate that more than one game was played. The balls were in different positions during different games.