We had our 5 year old son buckled in his forward facing car seat in the back passenger seat. When I started to drive my car, the front passenger seat started to move back, reclined on its own and fully crushed my sons legs in the back seat (fully reclined back). My son started to scream in pain. After securing the seat forward, we noticed our umbrella fell from the front seat and landed where you control the seat alignment in front. We were shocked to see that a 1 lbs umbrella can be heavy enough to control the seat alignment. If I hadn't quickly reacted to the seat moving back, it would have caused a serious fatal injury to my son. I strongly urge the manufacturer to consider fail proof ways to prevent this from happening.