She had a flood on day one in this chair of all chairs...

This situation, thankfully!, didn't happen to me but I witnessed...

I was school, seventh grade actually, when one day one of my classmates was expecting her period anyday. She had irregular and the most unpredictable periods ever. And on this day we had a substitute teacher so we didn't have to sit in our assigned seats. Rather than sit in one of the dark-colored chairs, she choose a bright buttery yellow chair to sit in. So as class time goes by, she kept shifting around in the seat and then leaned over to one of my friends and whispered "I think my visitor just came." Then she asked the sub could she go to the restroom. The sub let her go, and as soon as she got up she bolted for the door. My friend and I both looked at her seat, and sure enough that buttery yellow chair had a red puddle. Needless to say, she needed a pad and a change of clothes.