In the event of rapid depressurization, oxygen masks will fall..
So there I was, watching "Supercross" the movie, praying that Supercross 2 is never made and totally not understanding how Air Canada picked this as a movie for all the month of November..When all the sudden Pop..flop.. there are 3 emergency oxygen masks hanging in front of me. Just me.
Being me, I think 2 thoughts, 1."OK..so I am the only one that gets to breath, I better get ready to defend my oxygen." and 2. "Obviously this is a mistake, I would look really stupid if I put it on and activated the O2" (and cost AC some $$ and a delay to fix the system.)
I flag a passing FA, she is as bewildered as me. In the end the system was stuffed back into the overhead area. The Captain later decided that it might not deploy should I actually need to use it, so it was pried open by my seat mate with a credit card and left hanging for the duration of the flight.