Sunday, April 25: What Were You Thinking?

You've seen him in action on the Vegas Strip. You've seen him confronting crooked lottery clerks. But this time, it's no crime: Get ready for something totally different from Dateline's Chris Hansen. It's an all-new reality show, called "What a Pain!" -- and it's totally fake! The idea is to test reality-wannabe contestants to see how far they'll go. Would they deliberately hurt someone else just because they're told do? Or, how about this: An enclosed room fills with smoke. Would people bolt for the door or sit tight for more?

You're going to be surprised at the shocking things people can be persuaded to do. Join Chris Hansen for "What Were You Thinking?"

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