So who sits in the middle??

Brother in law just did this last week to my nephew while out on the skidoo trail. Guy behind the nephew pinned it and then slammed into the nephew! No one hurt but thousands of dollars damage!!
Snowmobile motocross? :wtf: How do you bag it before you notice the guy in front of you is not moving? Trying to cut "The perfect light"? Trying to get a good restart in the Molson Golden 200? :wtf: