I just moved offices (a scant six weeks before I leave, but whatever) and they have a little coffee area up here. There's a sign posted on how to make coffee, not too unusual. One of the lines there is says something about "the red LED," which has sparked a whole pencilled-in discussion, in a various handwritings:

-Is it actually an LED or a just a red light?
-take a spectrum
-write a proposal to build a spectrograph
-need coffee to write the proposal!

all of which I just find hilarious.