Larger-Than-Life Character Qualities

What to make your character EVEN MORE INTERESTING? Let's do this.

How do you build larger than life characters in your current manuscript?  What does your protagonist say, think, or do, that he or she would never in their wildest dreams venture to?  

-- What is the one thing that your character would never, ever say, think, or do?

-- Find places in your story in which your protagonist must say, do, and think those very things.  What are the circumstances?  What are the consequences?  

What qualifies as a larger-than-life action?  Winking at a stranger is easy for a flirt; to a shy person it is huge.  It is satisfying we would all like to let loose our inner devil- or angel.  Here is your character do, say, or think something memorable.  This doesn't mean necessarily mean turning our characters into wise-crackers or pulp cliches.  It does mean pushing them out of their bounds, whatever those might be.