Mowing with child on your lap

I use to ride on my Grampas full size Massey Ferguson while he was tilling, raking, baling, etc. I would jump on and off, well one time I slipped jumping on and slipped right under the rear tractor tire, gramps never noticed me until he had driven over my leg! I was about 9 years old at the time, thankfully the ground was moist and soft, and the Massey pushed me into the ground more than it hurt me. Needless to say, shot offa the tractor grabbed me up and took me back to the farm and iced my leg. Nothing broken, torn, just Grampas nerves! LOL RIP Gramps miss ya every day. Id let ya run me over again to spend another day with you.