Well thanks for pointing it out, type-o. Should be where people that shouldn't find out (be aware) could easily be aware. Examples off the top of my head -
With the choir director in a confessional while church is on.
In your mother-in-law's guest bathroom while she's entertaining guests.
In the projection closet while a meeting is going on in the conference room.
In an airplane bathroom (which actually qualifies under another one)
In the back row of the movie theater. (Don't try this if you're not an exhibitionist. I managed a movie theater in college and there's a space behind the screen for management to check up on the audience. You can see right through the screen and they can't see you. I've seen more than one open top that way.)
You get the picture now.