After fixing your bike all up from the crash and go back to the "Kick Stand" (the bar you start the game in), there will be a Semi in the front. Enter the bar, there will be a man at a table playing with a knife, stabbing around his fingers, and occasionally hitting his fingers. Talk to the man (Emmet) at the table and say to him "I know how to do that". He will give a remark. Keep bothering him by saying "I know how to do that," and "Let me show you how to do that". Eventually he will say "All right, if it'll shut you up". You can now play the same game with the knife and your hand, and can even give yourself cuts. You may repeat this as many times as desired.
Activate the following cheats by entering the corresponding codes:CHEAT FUNCTION - CHEAT CODE Skip Destruction Derby - Press CTRL + C. Easy wins - Press LEFT SHIFT + V while fighting the bikers on the Old Mine Road or during the destruction derby. View ending sequence - Press LEFT SHIFT + W during game play. View version number - Press CTRL + V during game play.
Steal an extra box of bunnies and save them until near the end. When you are on the front of the truck speeding down the highway, open up the engine compartment. Then, get the box out of the inventory and put it on the engine fan. Ben will put the rabbits in the blade one at time and shred them. Also, in his rough voice he will say "Cool".