I remember when I was maybe 10-11 and my parents signed me up for a theater summer camp course at our local museum of science, to get me to be less shy in front of people. It was a blast, but at the end of the course we had to recite a few skits/poems in front of all our parents and guests. Well, I did my one skit with another girl just fine but when it came time to do my solo monologue, I totally blanked. The poor camp counselor was trying to feed me the lines but it was getting ridiculous, it just wasn't coming back to me. So I ended up just walking off stage. I was really mortified and I think my parents were as well. Needless to say, I still don't do any public speaking if I don't have to lol But unfortunately in my science major I do have to do a lot of short presentations. Although now that I think about it I did two presentation in the following grade school years where I got so nervous for one reason or another that I actually started crying. Another horrible moment in front of the whole class! lol Thankfully I seem to have outgrown that level of fear.
Another lesser one but still sort of horrible for me was when I had JUST met my boyfriend's older sister. Now, this is a boyfriend that I can see myself marrying in a few years, so making a good impression with his family is a big thing. His sister is 30 and had just had a baby like 5 months prior, so she was still dealing with the last of her baby weight and feeling self conscious. They invited me to a pool and I hadn't brought anything to swim with so she offered me one of her bathing suits. When she handed it to me she said "I hope it fits ok," and I replied without thinking "if worse comes to worst I think I have a safety pin in my purse." And the poor woman replies "Man, I'm not that fat!" She didn't sound very offended but I was horrified. I just didn't want to accidentally flash someone because she's bigger up top than I am lol Almost a year later we're still friends and she likes me but I was like, great, I just called my boyfriend's sister fat and she's never going to like me again.