LSD

LSD is a drug often used by the Beatles to hallucinate. People who used it had what was called an acid trip. Some people had "good trips" where they say great things. If you were watching football on TV, they might see angels instead of players. There were also "bad trips" where people saw terrible things. If you had a bad trip while watching football, the players might be skeletons and coming at you. Many years later, someone who had LSD would have a flashback where, no matter what kind of trip they had, would see HORRIBLE things. LSD is illegal now.

LSD was introduced to John and Cynthia Lennon by a dentist at a dinner party. John continued having it while Cynthia (who had a bad trip) stopped. John also had George, Ringo, and Paul (who was reluctant at first) try it. Paul was the first Beatle to talk openly about LSD. Paul said that Lucy in the Sky with Diamonds (though see), Got To Get You Into My Life, and Day Tripper were about LSD. People also believe I Am The Walrus and Glass Onion were inspired by LSD.