Look what I did today :D

[elvo]

Originally Posted by DoughtyUK.net

surely it does not back off due to inertia? SURELY not??

if it does.. wow....

Of course. What else?
The "engineering" solution to this would be to use left-hand threads, like on the cranks of your bicycle, or the crankshaft of your 1:1 car.
But maybe a high nut with fresh nyloc would do.