I`ve got one similar to Nails` story.
I was training one day doing delts + arms, and this big disproportionate looking dude comes walking in with imaginary latspread syndrome.......weighs a shitty looking 220 or so,he`s got on a tight tank top,tan,and lots of shitty looking jailhouse tats......also has some slutty looking junkie chick in tow carrying his gym bag.
I finish delts and am about to start training biceps and he almost bumps into me at the DB rack,grabs the 50`s and all the while screaming grunts out 8 shitty reps with incredibly shitty form,then looks at me like he`s billy badass!
I then proceed to walk my 165 pound frame over to the 50`s, grab them and sit down, and bang out 12 picture perfect reps on alternate DB Curls.
The guy looked like I just raped his sister........all during my workout he watched me train hard and tried his best to use the biggest weights he could handle,in sloppy style and all the while screaming his ass off on every rep.

I think I hurt his pride.........looked like he felt like he felt like crying.