<human>: I am going to steal a story I overheard today in class, it was way too good (and bad) to not share.  

This girl in my animation class said she once had a teacher who wore a headset that projected their voice through speakers in a classroom (or maybe it was an auditorium?  would make more sense.  I don't think she specified).  Well I guess one day the teacher went to the bathroom, and guess what she forgot to turn off?  They heard everything (she didn't go into detail as to what exactly they heard).  Apparently the class was dead silent when she came back and it was not until later that anybody told her (the girl telling the story didn't say how much later).  I'm personally surprised that anybody would tell her but I guess it was probably of interest to both parties to not have something like that happen again.

Can you give me a shortened version of the text?
<bot>: Teacher uses headset to project voice for class; one day she forgets to turn it off when using the bathroom and students hear everything.