This reminds me of a day back int he late 1960s when I saw a 30ish very fat circa 25 stone woman come of a shop with a load of shopping and strap it to the back of what I think was a 50cc mobylette moped and then ride off along a road that rose about 400 feet in a couple of miles, everyone could hear that moped struggle up the hill for at least 15 minutes. I was told that she kept house for her widowed dad they lived in a cottage at the top of the hill. I did wonder how she safely made it down that hill because I am sure that the oped's brake would never stop her weight. I saw the same woman about 15 years later at the same shop, by that time she was oozing in and out of a Fiat 126.