history: I was supposed to meet a friend on his boat at a marina. I'd never seen his boat but he described it to me.  Unfortunately when I got to the marina he wasn't there, so I got on the first boat that looked like what he described.  But it wasn't his!  Fortunately my friend saw me before the boat's owner did and I got off and on the right one.
current: I got on a stranger's boat by accident at the marina.
next: That must have been awkward.