There's no real "collision detection". If you take a turn in the air, you bounce off that magical invisible wall and land right on your wheels with no damage.
Music is a generic sampling of the pop-punk found in many games today, but you won't hear much of it, because it's obscured by the incessant, annoying buzz of motorbike engines.
Not an awful game. It just isn't a good game. It isn't anything. It feels like it happened by accident (an artist tripped and accidentally made a McGrath model).
Having this game on the Dreamcast is an insult, and Acclaim needs to know that we won't put up with this type of garbage. Stay away from Jeremy McGrath Supercross 2000 at all cost. It's not worth even thinking about.