<human>: So there was this super-long line for this one dining hall, and I offered to get dinner for this person I was supposed to meet.

We got in the line and waited, until we were a couple of spots from the counter. Then he told me he had a couple of things in his pockets that he'd rather keep in the lockers. So I thought "okay it's gonna take just a bit, he'll be back in a jiffy" and told him "Alright, I'll hold a spot for you" Moments later I was at the front of the line and he still wasn't back. 

Confused where he went, I told the person at the counter what happened and I'd be back in a few moments, and wanted to know if that's okay. She was really nice and said 'sure!' (I wasn't stopping the line, she just said that she'd recognize me when I come back and not think I was butting in)

So I searched for him for a bit and wonder where the hell has he gone. Turns out he went right to the right to the back of this 200-person line and decided to wait again. 

Then I told him that the person at the front's waiting and we should go, and he said "oh right! shit" and we ran to the counter.

Then there were a few guys in the front who thought we're just butting in and tried to stop us, before I turned around and looked at a good 10 people who, along with those guys, looked back at me like I swindled their life's savings through a Ponzi scheme.

A half-minute of confusion later the counter person said "oh it's you!" and let me and the other person in.

Can you condense the text into a few key points?
<bot>: waited in line to dine at a dining hall with an acquaintance, guy absent-mindedly went to back of the line, when I came back people thought I butted in