When I was about 15 I was on the bus to school when a handful of individually wrapped tampons rolled down the aisle. They were the non-applicator type that we called "mice".
It became clear that they had come out of the school bag of a girl sitting in the back row and we all watched in horror as they rolled backwards and forwards as the bus lurched forward. and slowed down. We held our collective breath when we went around a corner.
But one by one, the mice were rescued by individual girls and at the end of the trip were handed back to the mortified girl to deal with.
Anonymous aged 51