10.5m old. Suddenly cries/screams from sleep, arms and legs waving. Any attempt to console (verbal or physical) either descends into screaming or just makes the screaming worse. Will exert a pretty impressive amount of strength to break free if picked up (again while screaming). Only thing that will console is the boob. Eyes are closed the entire time.
Dad has parasomnia every night (dives out of bed to catch DC) and so does his brother (genetic?)