Destin Sandlin has one of the most popular YouTube channels, Smarter Every Day, but he momentarily made a lot of fans worried there might not be any more videos after this latest experiment—turning off a flying helicopter to prove a point. That point is that astrophysicist and Internet science man who likes to pedantically correct everyone Neil deGrasse Tyson is wrong, specifically about his claim that "An airplane whose engine fails is a glider. A helicopter whose engine fails is a brick."
As Sandlin terrifyingly demonstrates, things are a lot more complicated than that. Stick to astrophysics, Dyson! Leave the aerodynamics to the aeronautical engineers and the YouTubers! (The actual engine disconnect comes at 6:00, but you should enjoy the beautiful scenery until then.)