In career mode go to the second level (Canada), ride forward past the fat bully kid throwing snowballs at two other kids and keep going straight until you get to a path of wooden planks. Go down the path until you get to a trailer with a guy peeing off of it. Then go to the bottom of the trailer, hit the brakes, and listen. after awhile he should start saying things like, "ha,ha look... it freezes before it hits the lake!" and "woah, this must be a record!" and to knock him off into the lake you ride up the side of the trailer heading right towards him and at the last second to a hand stand o the very edge of the trailer and he should go flying off the side. If it doesn't work the first time try it again.
This is General Taco signing off--hope you like the hint! and rember! "taco, good; burrito, bad!"