My school did the St. Patrick's Day parade in NYC, all local parades, and the last school I went to performed at Disney World- but I had quit the band by then. I went on very few of those trips.
My first parade was, I think, three weeks after I learned how to play the trombone. I was the only newbie. I didn't have an uniform yet and I didn't know about that nifty invention that clips your music to your instrument (by the way, I was the only person that didn't have all the pieces memorized that day).
Imagine, I'm extremely nervous- shaking as a leaf, holding my music while trying to play. To make me stick out even more, I was wearing all white while everyone else had on a bright red uniform.
The trombone was the worst instrument I could have chosen to play because every move you make is so obvious. All in all, I was doing pretty well considering that I didn’t really know how to play. During the parade, someone from the crowd ran and took my music from me, he had a clothespin, and he pinned my music to a trumpet player who stood in front of me. Now all I had to do was read and play, I had finally calmed down and we had one more piece to play, "Stars and Stripes Forever." I never played the song straight through but I thought I could wing it and was excited to get it all over with. Someone announced that it was our last song and the crowd gathered around to listen. Then the other trombonists told me that they decided that they'd all play my part.

Aaaggggh

!!! Now that the crowd was really paying attention, they would all be able to tell if I made a mistake. I got jittery again- missed the cue and couldn't find where everyone was, the wind kept blowing the papers so I couldn't read them, and when I went to put the slide in sixth position I went too far and the slide flew on the ground all the way by the flutes which were about three or four rows in front of the trombones. It was horrible.
After that day, I avoided performances (other than concerts or prep rallies- I like those) like the plague. If I ever was put into a position in which I had to go, it was always pouring rain that day- talking about a bad omen.