I wondered if any of you knew anything about this or had a smiliar experience. It would appear that since having her dementia my nan has developed super human strength. She has wrenched nobs of the cooker in the night (Note I always turn off at mains for safety). Mangled a key in the lock of the shed (told her not to fiddle to no avail) and today wrenched a nob off the radiator which I found her fiddling with and she was quickly taken out of harm's way. Why is she so strong? I don't understand she was never like this before.