My grandma has a lot of things going on with her. She has severe dementia, congestive heart failure and pneumonia. Recently, she has started this sitting up in her chair on the very edge, then if you watch her, she appears to be falling asleep sitting up but she really isn't. She just sits there and keeps doing falling reflex over and over again jerking to sit up. She will sit and then just start to fall forward and quickly jerk herself to sit up. I know at night time, (she sleeps in a recliner since she is afraid of beds after being in rehab a few years ago), she slides out practically out of her chair to the point of where her feet are flat on the floor and shes' flat on her back. Is this normal? Is there a reason it's happening? Do I encourage her to sit back and relax? I'm just worried it's another sign of her getting closer and closer to dying or becoming sicker and I'm missing it.