Took the wheels off my mini (in 1989 when I was 17!!) to clean them, did front left, then rear left, moved over to the other side, jack lifted both wheels off the road together so they both came off cleaned BUT i only put the nuts back on one.........
200 yards down the road the next day, a severe noise, then wobble, then the wheel comes off, now it still amazes me how far it continued to roll and bounce scattering pedestrians, also the brake disc managed to dig a very nice groove in the road, its still there as a reminder to my stupidity today !!!!