This is a video of Paiste (a Swiss manufacturer of symbols, gongs and other metal percussion instruments) Gong Master Sven demonstrating how to properly play one of the company's 80-inch symphonic gongs. Contrary to my popular belief, apparently you don't just wail on it like you're swinging for a home run -- you just sort of tap at it and let the sound grow (plus sometimes only tickle it with what appears to be a giant cotton swab). Now I'm no Gong Master, but even I know the real secret to playing the gong is getting butt-ass naked first.
Keep going for the video, it's worth a watch to really hear how the sound develops from the instrument.
Thanks to Ashley G, who agrees the apartment below that room must rent for next to nothing.