OK, so the correct thing to do in this situation is tuck the cart behind or hook the wheels over a parking barrier/curb, or if there’s no other option tip the cart onto its back/handle side. Don’t just leave the cart loose rolling around. I’ve seen a gust of wind blow a loose cart into a parked car and smash the brake light cover out.

But also, if you’re physically disabled to this level how are you using the shopping cart in the first place?