Kimmel
I'm not usually much for Jimmy Kimmel, but this is pretty funny.
Obviously the people that avoid the cutting room floor are the ones that are entertaining in some specific way, but I'd be curious to know how that trick would work in a slightly more scientific setting. It would be interesting to know how many people would call the bluff, how many wouldn't notice, how many wouldn't care, etc. Running some of that data against information about the respondents current and past phones might produce some interesting trends.