1.speeding spheros skidding around the curvy turns of the swervy track there steering is very crap
2. service repairs fixing the sphero chariots from speeding,skidding and from crappy steering
3. spheros crashing and slamming into the strong large blocks some of the drivers went so fast that the drivers fell of the chariots even with a seat belt on.
4.so the sphero repairs services had to do lots of fixing to get them back on the swervy track to skid around the curves
5.