How to Detect a Liar

I just found a fascinating post, via Kevin, about liars, how to detect them, and how to understand their motivations. (I say "them" in the most abstract sense...I lie every day, probably several times.) Kevin calls it "pretty basic stuff;" nevertheless, it's stuff that, despite my obsession with behavioral bio, I've never read before. Here's the gist:

Whether we lie depends on our calculation of the reward/punishment equation. This is called “situational honesty.” Because most of us are conditioned to believe lying is wrong, it creates stress...The degree of emotional discomfort is determined by two factors: the adverse consequences of the lie and our perception of being caught.

Those little white lies, the article explains, don't stress us out because a) there are no adverse consequences; and b) it's unlikely your deception will be found out. Conversely, if you're, say, Jeffrey Skilling (whom superlative-loving CBS news calls "the most vilified figure from the most notorious financial scandal of the decade"), then your lies have enormous adverse consequences AND are likely to be found out. Big lies thus put you in a high-stress mode, complete with "telltale behavioral changes."

What are these changes? I know from Meet the Fockers that your pulse races...but what do the real lie-detecting experts look for? The article mentions several lying behaviors:

• Repetition of the question
  
• Selective memory (I might have been there, I might have been off; I just don't remember)
  
• Oaths (Honey, I swear on my mother's life, nothing happened!)
  
• Character testimony (I'm an honest person--ask any of my friends)
  
• Answering with a question
  
• Overuse of respect
  
• Avoiding emotive words
  
• Covering mouth with hands
  
• Assuming a "fleeing position" (That's because, when threatened, humans react with a “fight or flight” mentality....neat-o, right?)
  
  

This list is somewhat exhaustive, no? Makes me wonder, what behaviors are left for that hypothetical Ben Stiller, under duress, who's trying to tell the truth?