Double Dash!!

The Double Dash!! (or just Double Dash without the exclamation marks) is a move that can be performed only in the co-op play mode of Mario Kart: Double Dash!! Before the race starts, when Lakitu is counting down, if both players perform a Rocket Start at the same time, the kart will be launched at an even greater speed than a normal Rocket Start. The name of the move is also present in the title of the game it appears in.