It is clear the tracks are getting more complicated, the bikes faster and the riders more agressive. But it is curious to see that a lot of accidents happen in warm up laps, like Ernie's, Jimmy Button's and many others.
Tracks should be made considering safety as first factor, insted of thinking just at the spectacular factor. Sooner or later you are going to make a big mistake and the traks shoul be made to forgive your mistake. Riders should refuse to ride where safety measure are not enough!