The Vulcan nerve pinch, of course. ProfessorTrek 01:50, July 20, 2011 (UTC)
Actually this seems to be a common theme in time travel episodes, usually they try to bluff their way out of the situation before trying to run away, with varying success.
- Kirk: How can your wife let you go out like that?
- Spock: Yes, you look very untidy.
- [Spock reaches up to brush off the policeman's shoulder and gives him a nerve pinch.]
Since Spock did it, it must be the logical thing to do.