I did do drop tests on one of the firearms that I polished the trigger bar on, just to make sure I didn't do too much. Snap cap and drop on smooth concrete floor.
The ones i remember was a raven arms, it wouldn't work for nothing. threw it at a washing machine lid i had a target pasted on. even missed the target by throwing it. also a revolver that blew up in my face, i bounced that sucker off a tree. and a tec 9 that wouldn't work and when it did it was full auto.
i like throwing things when they don't work. threw a crapsman chainsaw up in a tree when it wouldn't start back. it got stuck. luckily it wasn't that far up and i was able to get it down. i don't own any of those items now.