Happy Bicycle Day, which doesn’t celebrate bicycles but the effects of LSD:
On April 19, 1943, Albert Hofmann, a researcher at Sandoz Laboratories in Basel, Switzerland, purposely ingested .25 milligrams (250 micrograms) of LSD at his lab. He thought this would be the threshold dose—the lowest amount taken where there are still effects—when in reality the threshold dose for LSD is only 20 micrograms. But what does a bicycle have to do with the day?
Within an hour, Hofmann began to notice changes in his perception and senses. He decided that he should go home, so he hopped on his bicycle and began riding. Because the drug was already greatly affecting him, he had his laboratory assistant help guide him to his house. At times during his bicycle ride, he thought he was going insane, thought his neighbor was a witch and thought the LSD had poisoned him.
He later wrote in LSD: My Problem Child, “On the way home, my condition began to assume threatening forms. Everything in my field of vision wavered and was distorted as if seen in a curved mirror. I also had the sensation of being unable to move from the spot. Nevertheless, my assistant later told me that we had traveled very rapidly.”
Needless to say, his bicycle ride was quite a trip.