Google likes to have a laugh from time to time, even though sometimes the jokes are too geeky for non-programmers to grasp. Still, the teapot error page is fun even if you don’t get the reference. Go to google.com/teapot and feel free to pour it out. It works best on a phone or tablet.
This 418 error is actually a reference to an April Fools gag from 1998 when Larry Masinter created and published the satirical Hyper Text Coffee Pot Control Protocol (HTCPCP).
Google’s Adorable "Teapot" Error 418 Page Is Short And Stout (And Interactive) was written by the awesome team at Android Police.