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by xpac 3102 days ago
On the 33c3 (last year‘s Chaos Communication Congress in Hamburg), some folks brought their self made directional loudspeaker, mounted on a camera tripod. They set it up so it hit the ceiling right above an escalator, so everybody on the escalator was rickrolled, but only for like 2-3 seconds. Short enough to get confused, but not long enough to be sure it was actually meant for them.

At the top of the escalator was a growing crowd of confused people looking around for what the hell did just happen ;-)