When I pushed the button on the handle to close the back sliding door, my 2 year old suddenly stuck his hand in front of where the door was shutting and the door did not stop. Thankfully I was able to push the button back open almost immediately but his hand bruised immediately. We applied ice and the swelling went down but it could have been much worse hadn't I opened the door back up right away. There should be a sensor that stops the door if something is in its way.