Haha, I sabotaged another racer's car because he accidentally wrecked mine!
Oh no, what did you do to his car?
I equipped it with a high-power magnet.
You said the wreck they caused was an accident. Why would you want to get revenge on someone for an accident. Damaging someone's properly intentionally is not an appropriate response to this.
He made a mistake. He must pay.
Deliberately sabotaging someone else's car is going to get you in trouble. You should forget the accident and focus on beating him in the next race.