<human>: Well, I *some-what* fucked up - anyway...

This happened a few hours ago, I was in a GameStop trying to trade in some old games for new ones because I usually end up not playing most games twice, unless it something really good.

I ended up with about $13 credit after all the trade-ins, and was offered a a Gift Card - but, I hardly ever shop at GameStop (in favor of digital or Amazon) so I thought I'd do the nice thing and tell the guy to pay it forward to a customs whom he think needs it, like a kid who comes up a bit short or it's someones birthday (Ya' know, brighten someones day a little)...

Well, this is where the fuck-up happens. 

(It's important to note that during all this trading there was a line of about 3 people behind me and only one clerk). 

Turns out the guy behind me (Late 20's, probably) heard me tell the clerk that I wanted to pay the extra forward and **demands** that the credit go to him for his Call of Duty game that he wanted. 

A bit confused, and I'm still trying to finish the trade (signing the receipt, putting the new games in a bag) the clerk politely tells himthat it was meant for something else but he'd happily give the few customers in line a couple dollars off. 

But no, apparently that's not good enough for Mr. Call of Duty. He needs all that precious $13 for himself, quoting "I'm fucking next man, it's only fair" 

The clerk asks him to calm down, he's having 0% of that. Kicks over a Fallout 4 and Call of Duty display. I just stand there, dumbfounded while the clerk call for security. 

When they get there, and take him away (Still being a little angry twat) the other people in line left and the store was a bit of a mess. I get my stuff, offer to help clean up (he said not to bother) and go home....Still very confused.

Give me a shortened version of the text
<bot>: Offered a $13 pay-it-forward credit for someone having a rough day. Guy gets mad, has a fit, security is called - Probably more than $13 of damage.