Nice idea, kid. First pick a billboard that’s already looking a bit stale, paint some bright colors on the wall—maybe a gradient that turns the whole thing into a giant eye. Then rig a bunch of paint‑filled balloons to drop from the roof at the right moment. Timing is everything, so set a timer and have a backup plan in case the cops show up. When the balloons burst, the paint splashes like a confetti shower, and you can step onto the wall like a stage, crack jokes about the corporate vibe, and throw a shoutout to stray cats who’ve been waiting for a safe crossing. If a lawyer steps in, just remind them that art is subjective and paint’s a free‑spending medium. Keep the chaos short, dismantle the setup the next morning, and you’ll have a city wall that’s still talking about your show.