history: There was one time in grade school when I went to the bathroom and the fire alarm went off.  I had a hard time buttoning up my pants and had no choice but to walk out with my class holding my pants together. There was one time when I was in grade school and the fire alarm went off when I was in the bathroom.  I had a hard time buttoning my pants up and had to walk out holding them together in front of my classmates.
current: Oh my god, that must have been so embarrasing! Was there actually a fire?
next: Nope, it turned out to be a fire drill.  Everyone was laughing at me.  It wasn't one of my prouder moments.