Exploratorium, San Francisco
Matt and David (two middle-schoolers I've never met!) explain my exhibit surprisingly well in the first video. Basically, a computer screen displays one visitor's changing physiological arousal as another visitor asks embarrassing questions.
I originally planned this as a single person experience where the visitor responds to strong emotional videos. However, during early visitor testing we unexpectedly discovered stronger readings occurred as a two-person experience. Unprompted, companions of visitors trying the exhibit started saying things to "get a rise" from friends how were "hooked-up". I pivoted, and created cards with questions designed specifically to prompt pairs of visitors to do just this in friendly ways.