I have mine land on the grass and havent seen people slipping over but to be honest never really checked how slippery it was. I never had it going over the driveway partly because of the concerns you are having but no doubt someone who has had it landing on a driveway or path can chip in and answer that. Failing that I guess you could always make some fluid, fire it over your driveway and see if it will be a problem it not.