Quite likely. I nearly drowned once at sea and my friend came out to get me but I kept dragging him under because I literally had no energy left to do anything,

Quite likely. I nearly drowned once at sea and my friend came out to get me but I kept dragging him under because I literally had no energy left to do anything, let alone the brain power to coordinate my movements. Fortunately he was a very strong swimmer and so we made it back in one piece.