What if while the neighbor is calibrating the laser sight on his hunting rifle a bird craps in his eye causing him to jerk the weapon up resulting in the laser blinding the cockpit crew of a passing airline which then crashes into you while on your propane ZTR? Smash, spark, BOOM! Just as possible as your what if and almost as probable. Seems to me that higher COG would make it more likely to rollover, not slide. Also seems to me there are other much more probable things to worry about than these low probability, multiple failure, highly unlikely scenarios.