davidehrlich’s review published on Letterboxd :
Once upon a time in American history (1918, to be precise), a man by the name of J.R. Brinkley got the bright idea that impotence could be cured by transplanting goat testicles into human bodies. The only thing crazier than his hypothesis was that people — thousands of them — actually believed him. As illuminating as it is immensely entertaining, Penny Lane's doc uses charming hand-crafted animation to trace how Brinkley ballooned a wacko epiphany into a vast media empire built on nothing but hot air. It's a chronicle of the American dream in action, and the fact that it's all true didn't stop Lane's film from ending with the best twist of this year's Sundance.