You know what is so freaky about tractor safety is that it is a virtual constant.
You can take a short cut and step over an operating PTO dozens and dozens of times without incident, or stand on your post hole digger to add more weight, or you can bushhog a slope mumerous times at 10+ degree angle and not tip, or lift an extremely heavy load in your FEL and not tip, or drag dozens of logs with your 3pt hitch instead of the drawbar and not flip, or give a young child a ride in the cab without incident.
But it is that ONE time that gets you, it may not be your first, but it certainly becomes your last.