We had a guy come into the county ED that had hit a tree. That dude weight an easy 300+lbs and was jacked up. The fat rolls helped, but he still managed to get a tube in his lung and more than one cast. The tree lived.Fire/EMS for 25 years. Seen a whole lot of cars hit +8" diameter trees. And we say the tree is undefeated. He brushed very close to big trees. Had he hit one at that speed, instant death would not surprise me.
I guess those guys have special bicycle seats made to leave room for their giant balls.