ok, but seriously....its just a feature to allow you to smash gas, and do a wonderful launch .

basically put car in first gear, make sure its not rolling or moving....while in first gear, hold the gas pedal all the way down......it should bounce around at 5 grand(stock 05's and up) i believe......and thats your two step.

i'd advise not to use it or try and launching on it without reading post on how to do it which i wont get into beacuse its widely redily available.