i have'nt, but i've always been curious how i would fair if i did. i came real close to fipping it over backwards whilst mowing straight up a slope the other day, actually i was backing back down the slope and looking behind me, i thought suddenly things were looking quite a bit steeper when i turned around and saw my front wheeles about a foot and a half off the ground. i try not to do that often . it seems like it would be kind of difficult to get out from behind the joy stix and off the mower in such a short amount of time as a roll over would give you. any experiences? or am i just the black sheep?