Seems to me, since this is a timed event, and the goal is to hit as many cones as possible in the allotted time, having a spotter on the course would be a MAJOR safety concern. In my own opinion, any "spotting" should take place from a "safe distance" like, outside the course, in addition, the course must be fully contained with concrete "K rails". Time would have to be stopped in the event of a rollover to allow for recovery, and, if the competitor decides to continue after the recovery, the clock is restarted. Safety for all involved, participants, spectators, and volunteers is of the utmost importance if we are to continue to enjoy these type of events in the future. The spectators will also have to be in a safety zone of sorts as well. If you've ever seen a "monster truck" show, you'll note the first several rows are left empty, and they use large dumpsters covered with banners, as a cushion between the arena and the spectators. I may e thinking too much, and complicating things, but the last thing ANYBODY wants, is for someone to get hurt.
... (done) Rock on!!
