Background (2003): A systematic review of the literature found no evidence to support the routine use of parachutes to prevent death from gravitational challeng

Background (2003): A systematic review of the literature found no evidence to support the routine use of parachutes to prevent death from gravitational challenge and concludes with "We think that everyone might benefit if the most radical protagonists of evidence based medicine organised and participated in a double blind, randomised, placebo controlled, crossover trial of the parachute." [https://www.bmj.com/content/327/7429/1459 https://www.bmj.com/content/327/7429/1459] 2018: Protagonists of EBM both organized and participated in such a study and found that parachutes don't make any difference in survival when jumping from a plane. Also in 2018, https://www.cmajopen.ca/content/6/1/E31.full https://www.cmajopen.ca/content/6/1/E31.full looked at the use of the parachute metaphor in medicine and confirmed most people didn't quite get the joke