If your riding in mountains or any area for that matter and the sled can be rolled then you should have a tether. When a fuel injected sled rolls over and the throttle is pinched between the snow and the handle bars it causes the track to accelerate creating a dangerous situation for everyone not just the RIDER.
NOTE: They are a pain in the *** in the trees tho getting snagged on branches and shutting engine down has caused me lots of fits of anger the Skidoo now has them on the throttle side of sled which works much better I rarely let go with that hand. however I have had it snagged also.
