Took my nephew back in the woods to ride my 4 wheeler. About 1 mile back in the woods I let him ride. after about 10 minutes I found him with the bike shut down.Having only pull start I made sure the key was on and we pulled till we could pull no more. We pushed the bike back to the house(quite the workout). I started to trouble shoot the quad. And I saw the kill switch in the off position. I said no way! Turned on the switch and it started right up.I never shut a bike off with a kill switch but learned the hard way that day.