I regularly do some pretty stupid things on mountain bikes (scars to
show for it) but wouldn't be tempted to actually use one of the
motorized scooters (aka "gopeds") for transportation.

Maybe you should try one. I probably have several thousand miles on mine,
and it is by far the most convenient thing to carry as simple ground
transportation in a small plane. I've used it on all kinds of terrain and
it's no more prone to "endoing" than any bike I've ridden; the CG is way too
low to do that - you'd get thrown off the front if anything (which hasn't
happened to me).

Then again, "I ain't skerd" to ride anything. My favorite bike is the penny
farthing with a 4' front wheel. Now THAT thing will endo!