The power liftgate suddenly collapsed while I was standing underneath it. It dropped on top of my head pretty hard as it was a sudden drop of the liftgate. My safety was/is at risk and has caused injury to my head. Currently experiencing headaches. As condition progresses, I will be seeking medical attention. It is available for inspection. I have recorded a video of the problem. The problem is recurring and reproducing. I have not taken it to a dealer or independent service center today (9/13/2021 date of incident) as the weather is bad in my area (experiencing high rain and winds from a tropical storm). I will have it taken in on 9/14/2021. The vehicle has not been inspected by anyone. There were no warning indicators or other symptoms prior to the initial collapse.