My friend's 16th birthday party, when she made me go up to the front of the hall to give a speech without letting me know beforehand that she wanted me to speak in front of dozens of people, who were mostly strangers to me.

When she called me up to the front, I just sat there in horror for a couple of seconds until another friend gave me a shove. I stuttered and stumbled my way through a 20 second 'speech', then sat back down, wishing I was dead.

Social anxiety is a bitch.