That depends on how much you weigh. With a zero turn, I had a problem with the rear end sliding down hill and getting stuck. More than once I’ve had to tow it out of the ditch with my truck, so I had no choice but to mow sideways to the slope. What I do is to lean forward and to the uphill side on the zero mower to help keep the center of gravity as low as possible. Be sure to wear the seat belt and keep the roll over bar extended just in case you do actually roll over. The belt will help to keep you on the mower instead of under it.What about popping a wheelie and rolling backwards while going up the hill? Is that something to worry about with a lawn tractor?