Well, one thing I do remember that I did on purpose many times was as follows:
- First, have the opponent crash his/her car
- Then, approach slowly until you make contact with the crashed car. Too quick and you'll crash too
- Once you make contact, there is a chance you'll crash anyway, but more often, you won't
- You'll get stuck and won't be able to move out. Continue to try moving to the sides while accelerating gently
- If you accelerate too much, you'll eventually crash. If you do everything well, you may still crash
- But, after a while, if you're lucky, your car is suddenly launched flying for no reason either making spirals or shooting high up into the sky!