I can only deduce from the stories that have come out, bob wagner jr and walken were supposed to be having a drunken threesome with nat wood, but may have been too involved with each other, which angered wood. so she drunkenly donned her fur coat and went to exit the boat (yacht?) but slipped (pushed) and fell into the water. the fur coat caused her not to be able to tread water in her drunken state, so she drowned. was odd that neither walken, wagner nor the captain (who was on board at the time) managed to save her and took some time to actually call 911. reminded me of ted kennedy with maryjo capechne. I dont know all the details as I was not there, but remember hearing all these things.