Another serious answer:
Taking photos of a party at my salsa school, darkened room with a few coloured spots on a mirrorball, mostly full-body portraits if i could get the room
Just a selection of EXIFs from that night:
7D, EF-50 f/1.8 @ f/1.8, ISO5000, 1/50s, -2/3EV for Sassy doing a speech on stage with lights on him.
ISO 5000, 1/13s, -2/3EV for dancers with the lights on.
ISO5000, 1/100s, -8/3EV with the lights off and just the mirrorball.
or ISO3200, 1/50s, -1EV with a bit more lighting.
all in Av mode, lighting changing too rapidly for M, -EV exposure comp was to try to keep the noise down and not blow out the lights (didn't help most people were wearing black), couldn't use a flash (a: don't have one, b: can't piss off the dancers). too much motion blur in most of them, the others too dark, the rest too noisy even RAW-processed and shrunk to 1/4 original dimensions. sometimes even f/1.8 was not enough DOF to keep the entire subject in focus, so going f/1.4 or f/1.2 was out of the question, especially as they were dancing back and forward unpredictably.
yes, 7D and 50/1.8, best i had at the time (i even bought the 50/1.8 for shits and giggles just to try it for this event).
(yes, I would have taken a 5D2, or a 50/1.2, but i don't have them).
If i could have used even ISO16,000 with the same noise as a 7D's ISO3200 i would have loved the faster shutter, more DOF, and 0EV.