I can't remember how old I was, but there was an occassion when my family decided to go out to eat for dinner when I was a kid and I ended up getting sick. I was fine up until we got to the restuarant, I suddenly started feeling unwell as we were going in. I didn't want to ruin it for everyone, so I just didn't tell anyone.
I told everyone I wasn't hungry, and I tried acting interested when relatives talked to me, but I felt so bad that the entire hour and a half we were there was torture. I did order a Sprite thinking maybe drinking something might help, and drinking it just gave me something to focus on. There were free refills though – and our waitress was like remarkably on top of her job, so everytime my glass got like a quater full she would refill it, and I couldn't muster the energy to tell her I didn't want anymore because every last little bit I had was being spent trying to seem normal.
I could have stopped drinking, but like I said, drinking the soda was like the only thing grounding me, plus I didn't want to waste it. My plan was to wait for everyone to get their food so that the liklihood of anyone from my family being in the restroom when I was going to go puke my guts out would be extremely low. So I drank about 5 or 6 glasses of Sprite in that hour, the food was served, and I quickly made my way to the restroom, where I vomited Sprite flavored acid. There were other people in the restroom that heard me puking in a stall, and must have saw me come out to wash my face, but I wasn't paying attention to anyone at all. Anyway, washing my face felt nice, and I regained my composure to make my way back to the table my family was at... but then sat down to find another topped off glass of Sprite.
The next hour felt like an eternity as I forced myself to try finishing off that glass of Sprite after I just puked Sprite, and although eventually my stomach felt better, my energy was completely zapped. I have always been pretty quiet and to myself around family, so nobody caught on that I was feeling bad. When I got home I locked myself in my room and passed out.
That was the only time I got sick in public, it's also the reason I hate Sprite to this day.