Getting laid off is great, you get unemployment checks for sitting at home posting on getbig.
I'm thinking about something inconspicuous, like a small pen placed on top of a protruding wall ornament only I'm tall enough to reach.
I go into that room ALL the time, so my presence there during the day would attract zero attention.
Come d-day, I go in there faking a meeting, place the pen on the ornament, walk out and let it rip for about 10 hours.
At the end of the day I walk in faking some sort of conference call, retrieve the pen and walk out.
No one would notice a thing.