On Friday 2/18/2022 I was pulling into a parking space with my 2010 Honda Ridgeline. When applying the brake, the vehicle suddenly accelerated unintentionally and hit the car in the opposing parking space. I stood on the brake harder when I sensed the vehicle lurching forward. After I struck the opposing car, I confirmed that my foot was on the brake and not touching the accelerator. Also, oddly the vehicle immediately stopped running and I noticed the car was in Reverse. I took pictures and video immediately after the incident both inside the car and outside before I touched anything. I then put the car in Park, started the car, and backed it up. I inspected both cars for damage and did not find any damage. I left a note for the other car. The owner later called and confirmed she did not find any damage. One interesting thing that I noticed is that the parking space had a sewer drain in the front left corner that had a large slope and snow/ice surrounding it. The unintended acceleration occurred right when the front left tire hit that sloping ice patch.