speed.
this one's classic:
"Sicilians are great liars. The best in the world. I'm Sicilian. My father was the world heavy-weight champion of Sicilian liars. From growing up with him I learned the pantomime. There are seventeen different things a guy can do when he lies to give himself away. A guys got seventeen pantomimes. A woman's got twenty, but a guy's got seventeen... but, if you know them, like you know your own face, they beat lie detectors all to hell. Now, what we got here is a little game of show and tell. You don't wanna show me nothin', but you're tellin me everything. I know you know where they are, so tell me before I do some damage you won't walk away from."