It sounds like a cool scene out of Mission Impossible or James Bond, but police officers in St. Petersburg, Florida are testing a vehicle-based cannon that fires GPS tracking devices at cars.
So instead of continuing a high-speed pursuit, they can just tag a vehicle they're chasing and then track its location from a safe distance.
The system is known as Starchase, and it features an air cannon mounted to the front grill of a police car that fires GPS tracking units covered in soft adhesive substance so they immediately stick to their target. Once a pursued vehicle has been tagged, cops can stop their high-speed chase and fall back to s safe distance without losing their target. It also means the driver being pursued will slow down if they think they've lost the police.
See how it works in the video below: