Sixty-nine years ago today, Albert Hofmann went on a bike ride.Three days prior, the Swiss scientist inadvertently ingested enough lysergic acid diethylamide – a substance he’d first synthesized in late 1938 – to crack his brain open to the first shimmers of a strange and terrifying and beautiful trip. Curious, he wanted to know more.So on April 19, 1943, with a trip-sitting lab attendant at his side, Hofmann dropped a much higher dosage of LSD. You know, just to see where the winds would take him. Soon enough he panicked, at which point his trusty aid seated the good doctor on a bike, and set him on course for home. The rest is history. Bicycle Day was born.In that spirit, and because I can almost guarantee that there are more of you reading this who didn’t (or don’t plan to) actually drop and ride a bike today than those that did, below is your chance to hoist one up to the ’Hof from the comfort and safety of that plush new ergonomically-optimized swivel chair. These are either the greatest bike videos to watch with a headful of LSD, or the worst. I’m not sure.Read the rest over at Motherboard.