I have a clip from my dashcam floating around somewhere of me stopping, jumping out of my car, then hauling ass to catch someone's runaway cart moments before it hit a parked car. Honestly one of my proudest moments.

On the opposite end, I once left a cart (on a curb) and it haunted me. To be fair, it was absolutely storming outside and I was chilled to the bone and just wanted to warm up..