What's your wildest 'things that don't scale' move that actually worked?

Not looking for the usual "DM people on LinkedIn" or "personalized cold emails"

I want the weird stuff you tried that had insane results.

I'll start: We sent 50 pizzas with custom packaging to super specific people in our target persona.

Result: 95% called us back and hopped on a call.

The kicker? It wasn't even that expensive : got a bulk deal on the pizzas and DIY'd the packaging ourselves.

What's your story of doing something completely unscalable that paid off big time?