Recent Examples on the WebLikewise, in a second experiment, subjects were presented with the image of Kevin either gazing at the tube or gazing away in the opposite direction and asked to report the critical angle of the tube before toppling. Robert Martone, Scientific American, 29 Dec. 2020 The critical angle reported by subjects depended upon whether Kevin was blindfolded. Robert Martone, Scientific American, 29 Dec. 2020 As the airplane approaches that critical angle, the first event is a stall warning in the cockpit.New York Times, 18 Sep. 2019