The filmmaker’s “RIOT” changes according to your particular emotional reactions, and may change them too. Karen Palmer is out to scare people. For the past three years, she’s been plunging people into a stressful and potentially deadly riot, firmly believing that they’ll emerge changed for the better. The riot is fiction–that is, it’s really just a movie, in which actors play rioters, cops, and protesters–but due to a boost from technology, as well as good old-fashioned tricks from the world of theater, it can feel unnervingly real.Read Full Story