In June 1970, Major League Baseball pitcher Dock Ellis thought he had the day off, so he took some LSD. He was wrong. He didn't have the day off, his team the Pittsburgh Pirates were flying to San Diego to play the Padres that day. And he was high on LSD.
So he played high. And he ended up pitching a no-hitter – that's when the pitcher allows no hits by the opposing batters throughout an entire nine-inning game.
It's not super-rare – there have been 278 no-hitters in MLB history. But the feat has been hailed as "the greatest athletic achievement by a man on a psychedelic journey".
This animated short by No Mas tells the story of Dock Ellis and his LSD No-No.