I was at the mall with my mom today. The lights were eating away at me so I went to sit in a chair outside the store, and my mom said to stay right there while she looked for shoes. She called me after about fifteen minutes and said, "Hey, shoes at 30% off of three pairs, and if you buy a pair we can basically pay the same amount I'd pay on these two. Come on, I'll get you some shoes." I love shoes. This was no issue, getting me to suffer under the lights for the sake of shoes.
Anyway, fast-forward... I picked out my shoes. I lost some minutes after that due to the fluorescents setting me off, and suddenly when I "came to" I noticed that there were half a dozen people standing behind me and a guy rather annoyedly saying, "Can I HELP you?! Excuse me, miss? Are you being helped?" I was just kind of absent-mindedly (due to the lights, of course) standing next to my mom, who was paying. I didn't realize that I was blocking a whole register in a very, very crowded store.
The people behind me were scoffing and shaking their heads.
It occured to me afterward that I should've handed them my autism cards, but I was too fuzzy in the moment to do that.