Thu, 04/20/2023 - 04:30 Tech Insider Elon Musk has a number of go-to jokes involving 420 and 69.Evan Agostini/Invision/AP Tags Tech Insider, News, Features, Elon Musk, Visual Features, Business Visual Features, Classic Format, twitter, tesla, spacex Source A look back on Elon Musk's middle-school humor: from jokes about 420 and 69 to …