When I was at uni I went to a nearby shop for some hangover food, grabbed a bag of crisps and a few other things and paid for them. As I turned to leave I noticed a big pile of the same bags of crisps with a buy one get one free sign so I said to the guy at the counter "I'm just going to grab this other bag since it's 2 for 1." He said it was too late because I had already paid for it. I pulled out by best WTF face. We exhanged a few more words before I just walked out with both bags. I suppose some shop assistants like to go on power trips.



