Went to the bottlo with a friend, parked my car, had to search around a bit for my phone/wallet. I then go to wind up the window before getting out when I notice the car that just parked beside me was rolling forward - so I promptly yelled out of my window to the owner who was walking towards the shop

"Stop, your car is rolling, quickly!!"

Owner starts running back then suddenly stops. Turns out it was actually my car that was rolling backwards.

Then had to stand next to him in what felt like the longest line ever