next thing one knows

Roy: You remember the woman from last night? She seemed lovely, right? Moss: She was a delight. Roy: Yeah. We get outside, there's a group of tramps, two of whom she knows by name. She starts screaming at them, "You owe me money! You owe me money!" She thinks that the tramps owe her money. Next thing I know, it all kicks off. I'm running for my life. It was a horrible evening, a really horrible evening, and she's a really horrible woman. Moss: Right. But you slept with her? Roy: Yeah.