i was riding on a couple of logging roads on my friends property where we hunt and i rode up on a few deer crossing the trail. i stopped about 30 yards from them and killed the motor. they looked at me for a couple minutes and then went right back to feeding. i watched em till i got bored and started up and drove off, i could see that they weren't bothered in the least. i wasn't gunning the engine though, just kinda puttering