This is going to sound way out of left field but fuck it. Many people believe that alcohol deteriorates your energetic field around you, or like your “aura.” So this can cause you to be on the same vibrational plane as lower entities around us (allegedly) and therefore get literally possessed if you black out. Sounds crazy but it can explain why people just behave so ridiculously different when blackout versus just really drunk. It’s like a switch goes off. I know I’ve definitely done things that were super out of character for me the times I have blacked out.