you're at the disco with your friends, the disco is very big, since you're drunk you've lost your sense of direction and can't find your friends anymore. At a certain point you hear a very deep male voice behind you.

Oh...did the little princess get lost in this big disco?

IT'S YOUR EX, you saw him while he was kissing another girl and so you left him without even explaining, because you thought the evidence was enough for you...