weed vacuum
what if you could invent a vacuum that only picked up weed??? imagine how much weed you could find if you vacuumed your car, or your couch cushions, or if you just drop your weed on the ground, or my living room floor......
HOW TO PREVENT CAR CRASHES
Make all cars negative magnets so they just bounce off each other. Kinda like bumper carts, but with invisible shit.