Blast Corps

Ghost Rider: Yep as with Mario 64,  Blast Corps seems to have the same 
thing.  After sucessfully finishing a racing level re-enter that level 
using a different vehicle.

Instant Explosion:  Drive up next to a structure and try to get out of 
your vehicle using Z.  If your too clse your man will yell and not get 
out.  If you continue holding Z the object will blow up.

Turbo Start:  During the racing Levels, if you want a boost to beat those 
times hit the acceleration exactly on the last beep.  Timing must be 
perfect for this one.