Camel Jockey
Select the level Africa 2. Press and hold R1, R2, L1, and L2 for the entire race. You also have to finish 7th, so time the race perfectly. If you perform this nifty little trick just as I explained, then choose the same course again. Instead of riding a bike, you should be saddled on a camel.

Extreme Moves
These extreme moves are performed while jumping with any equipment.

Move                    	Difficulty      Points
Square, Triangle	Easy            50
Square, O, X		Medium          100
Square, O, Triangle	Hard            200

Equipment      Code
Skateboard     Triangle, X, Square, Circle
Snowboard      Triangle, Square, X, Circle
Mountain Bike  X, Square, Triangle, Circle + x,
		Circle, Square, Triangle
Rollerblades   Circle, Square, X, Triangle