I wasn't in the office Friday, so consider this my corollary to Alison's TGIF! entry.
Stealth Disco is the fun but not overly productive practice of sneaking up behind a colleague and getting your dance on while a co-worker video tapes you. Is this a holdover of dotcom culture? A good way to relieve stress at work? A way to help build camaraderie among team members? You make the call.
The site is work safe, but please be considerate and turn down your computer's volume.