 Bails (falling off the skateboard due to poor landing) cause no points to be awarded for the attempted trick and reset the special bar to empty.The controls of the game developed further the more the series progressed.While the original "Tony Hawk's Pro Skater" featured a fairly limited set of moves, later entries allowed the player to switch between moves during the same grind or manual sequence, perform transfers, hold on to and drive various vehicles, walk on foot and scale walls, slowing time, or performing more advanced tricks by pressing buttons repeatedly, for example a double or triple kickflip instead of a normal one.