While I was parking in the lot, the vehicle nearly came to a stop when it abruptly accelerated on its own. My foot was firmly planted on the brake, a standard practice at the end of the parking process. The sudden acceleration made it impossible to regain control, resulting in a collision with the parking lot sign and a small tree. I took decisive action to steer the vehicle away from the glass door of the building in front of me, but it ultimately struck the building wall to my right. This incident highlights serious safety issues, specifically Sudden Unintended Acceleration (SUA) and a failure of the Collision Avoidance Assist safety technology.