In one study, researchers Alan Gray, Brian Parkinson, and Robin Dunbar had pairs of strangers sit together for five minutes and watch a movie clip. Half watched a blooper reel from a popular TV comedy—one that had been pretested to get lots of laughs. The rest watched an emotionally neutral clip—think a nature channel documentary, or the lesser-known “Fifty Shades of Grayscale.”
When researchers asked participants to write a message to the person they had just met, the pairs who had watched the blooper clip disclosed significantly more personal information. And when a panel of observers watched these pairs converse, they rated their reactions between the blooper clip pairs as 30 percent more intimate than the ones between the pairs who had watched the neutral clip.