Glad you're ok.
It came with two wheels for a reason. Make sure your friend knows that.
Knock on wood: I've been riding since 92 and haven't wrecked or dropped a bike yet. I've been hit once but still kept the bike up.
Worste was running over a semi tire on the Jersey turnpike at 1am while doing 80. Not fun. Rear tire came up about 3-4 feet off the ground. Had to make the rest of the trip with no front brake and no coolant. From Jersey to Mass. About 200 and something miles. I was just happy I didn't get into a slapper.