There used to be a crash cooldown of around 3 seconds. I think it makes sense to have this reduced for classes but it'd be a great opportunity to use this in Challenges and Tournaments because as a lot of people say, these are there for experienced players to show off their skills. What I often see is a lot of people just rushing through the course, crashing 100 times and therefore abusing the short cooldown. With this change people would pay more attention to the course and it'd also set another level of difficulty towards regular Flying Classes.