This is my naive idea
Open up a shop in my home town. Purchase (some how) a mini-gun and charge people to fire it for a couple of minutes
I could charge like 30 bucks to fire it for 5 minutes. I'm sure a lot of people would go for it! Set up some targets like an old car or something of the sort. Of course, armed guards would be on site to take down anyone who wanted to run amok. I think there would be hordes of people waiting to fire this thing
Are they illegal in the US? Is there any licenses one could obtain to purchase one? How much does the ammo cost
All customers have to sign a contract saying I can't be held liable for any injury or death