Mr. Monk Is on the Run (2) - S6-E16
Audio problem: Toward the end of the episode, Mr. Monk runs out to stop the Governor's car before it crosses the banner and blows up. The first time that he yells out that "There is a bomb", you can see that Mr. Monk's mouth is not moving to say those words.
Answer: Notice also that in the opening credits scene when he is touching parking meters her also wipes his hand on his clothes each time he does it.