On this day in 1943, chemist Albert Hofmann embarked on the first LSD "trip." As a Swiss chemist working in the lab of Sandoz pharmaceutical company in Switzerland five years earlier, Hofmann was the first to create the psychedelic drug. But the psychedelic aspect of wasn't discovered until April 19, 1943. On that day 69 years ago, Hofmann took .25 milligrams of lysergic acid diethylamide and not long after asked a coworker to take him home. He did, on a bike, and Hofmann kind of freaked out before he was able to reel in the anxiety and enjoy the "colors and plays of shapes that persisted … Kaleidoscopic, fantastic images surged in on me," as he later wrote. Today is known as "Bicycle Day" because of the historic trip. Fans of psychoactive drugs have celebrated today by indulging in the chemical. (I sprinkled eight microdots into my morning coffee today, for example.) Tomorrow, of course, is 4/20, the pot-smokers celebration of … an established excuse to smoke pot all day. Saturday (April 21) is Record Store Day. That's quite a three-day holiday for the counterculture!LSD has inspired a lot of music. It famously influenced The Beatles' mid-’60s musical expansion; their song "Lucy in the Sky with Diamonds" is widely considered an acid tribute, though John Lennon said it wasn't, the "L," "S" and "D" in the title merely a coincidence. The songs "She Said She Said" and "Tomorrow Never Knows" from Revolver were confirmed to be about the drug, though. The Jefferson Airplane's "White Rabbit" was another huge LSD song, and bands like Pink Floyd and The Grateful Dead became forever associated with the drug thanks to their trippy sounds. There are, of course, as many songs about doing acid as their our Country tunes about lovin' America and drinking beer. More than anyone could ever listen to, in fact — from Syd Barrett's entire solo discography to some of today's top Dance music makers. WHOA! Does everyone else see that? Please tell me everyone else sees that.Here's a short film documenting (allegedly) Syd Barrett's first acid experience (NSFW, I suppose, but only for druggy silliness). Happy birthday, tripping balls!