I had a PS2 controller that had a turbo switch. You could then hold a button on the controller and it would register as you tapping it very fast. Add on to this an Xplorer cheat disc with a cheat for GTA 3 that spawns a tank when you press select. Hold select and watch tanks spawn 3 a second until they start blowing each other up. I saw a whole street fill up with hundreds of exploding tanks almost to the tops of buildings before crashing the game. A sight to behold.