It was a classic for the older generations, generations ago. The wholesome, often jazzy and big band sounds of "The Lawrence Welk Show" permeated your grandparents' TVs (or perhaps your great-great grandparents') for years, running from 1955 until 1982. They were always pretty straight arrows.
Well, one day in 1971, they gathered Dick Dale and Gale Farrell to sing Brewer and Shipley's song "One Toke Over The Line." Now, let's just say this song belongs more in a Cheech & Chong movie than the Lawrence Welk Show. However, I don't think Mr. Welk quite understood the full references. Perhaps focusing on the "sweet Jesus" line, Lawrence describes this song as a "modern spiritual." And that, in a way, could be correct. Either way, it's kind of mind-blowingly funny to watch, and what better day to share this than on 4/20?