I reached inside the back lift gate of the car when it dropped on my head. I went to the ER where they did a CT and MRI of my head and spine to rule out a fracture or head bleed.There was no warning message on the dash or problem noted from the dealership. I have owned the car since April 2021 and had no problem with it before that day. The car dealership has replaced the hydraulic lift struts on the back lift door. So I don't know if they still have the defective parts. I have contacted my insurance company but no representative came out to see it. A video of what the door did was sent to the car dealership and the insurance company.