Sounds like you’ve stumbled into the Twilight Zone of the city. Oh, I've got a good one: they say the old subway tunnel under the downtown square is actually a secret art studio for the city’s most eccentric graffiti artists. Every night, a bunch of them meet there, paint on the concrete, and then hide the finished pieces in random mailboxes that get delivered to unsuspecting residents. The weird glitch you heard? Probably just the hiss of a neon sign flickering from the underground club above. Next time you hear something glitchy, just imagine a secret rave happening beneath your feet while the city’s most creative rebels paint their hearts out. Trust me, it’s a lot cooler than you think.