Just found this thread and had to share my worst experience. It wasn't at a convention, it took place at my elementary school.
When I was about ten (I'm sixteen now), my mom made me a McDonalds French fries costume out of some foam and an old inflatable mattress. I loved it and was really happy to wear it at school. We weren't allowed to wear our costumes until lunch time so my mom came at lunch to help me put it on. I was walking with one of my friends when he jokingly told me that he was going to eat me so I laughed and started running away from him. I guess some kid must have yelled or something because I looked over at the playground and saw kids jumping off of it to come chase me. I was quite overweight then (still kind of am
) and couldn't run for very long. I stopped running and within about 30 seconds I was surrounded by what seemed to me like a thousand kids (probably closer to a hundred).
I was kind of freaking out at that point because I could feel the people closest to me grabbing at the foam fries and pushing me.
When the supervisors finally got all the kids off of me, I saw several foam fries laying on the ground around me. The costume wasn't really wrecked as it only took my mom about 20 minutes to fix it when I got home, but I was still really angry and avoided my friend for the rest of the lunch hour.
I'm a lot more careful with my costumes and props now because the majority of people at my school have no respect for other people's property. When I bring props to school for Drama or the like, I keep them in a garbage bag so people won't see them and try to wreck them.
At least I got a good story out of that experience
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