I’ve been looking for this anime for my entire life

When I was about 5 or 6 I was up in the middle of the night watching tv and saw the first bit of anime of any kind I had ever seen. I’ve glossed over countless lists of shows asked friends and searched the description of the only scene I can remember a million times.
The only thing I remember about it was a woman who woke up in a sealed room. Another woman inside was going on in hysterics about something, possibly to get out., until she just starts to slam her fists or head into the walls of the room until she collapses. I switched channels after this horrified. But I still remember it so vividly I want to go back and watch it. If anyone can help, you’ll have ended a 16 year old personal mystery of mine



View Reddit by Hen_TyeView Source