The Haunted Boat (2005)

Kevin inherits a boat from his uncle, invites his friends out for the weekend and who the hell knows what happens.  The motor stops working. The geeky guy jumps into the water and never resurfaces.  The others freak. They hear things at night. There is a presence  outside on the deck. Two guys go off in a dinghy and disappear.  A creepy ghostly stranger show up. Wait, the two guys are back.  Ooops, they're gone again. Wait, they're all dead.  Um, what?

When you try to be tricky and put twists, red herrings, dreams, parallel universes, and hallucinations in a film, unless you're very lucky and good at your craft all you end up with at the end is viewers uttering a collective, "what the hell.....?!"