Бафф вешается корректно.

Единственное, бафф спадает если игрок покидает управление болидом.

https://www.wowhead.com/achievement=...ents:id=529860

I noticed you recieve a buff that states how many times you've slammed other cars without getting destroyed.once you have slammed other cars.

Rather fun to walk around with a buff that says something along the lines of 7 cars slammed (or how many you managed to slam before getting destroyed) whilst going about your business :)