Myself and my buddy both died from falling off the top deck of that ship.
Me- hugged a wall right where the ship is broken on the top. Hugging the wall felt like a normal movement and not a large risk. The floor texture seemed a bit glitchy though and I fell, surprised, to my death.

My friend- went close to the same edge to see if he could see my body. When he stopped moving he *slid off of the same edge and he fell, surprised, to his death.

Neither one of us felt we made any movement mistakes.