During the Them Crooked Vultures period of Dave Grohl's life, he was drinking a massive amount of coffee. Apparently, all that java caused the Foo Fighters frontman to start losing his mind, as he revealed to the Bon Appétit Foodcast. Grohl admits he was so busy at the time, he wasn't sleeping more than four hours a night. So he'd drink a pot of coffee in the morning. Then another when he arrived at the studio. While laying down tracks with his other band, he'd drink a third pot plus down iced tea. According to Dave, all of that caffeine made him feel like he "was on crack," adding, "I was losing my f***ing mind, I was spazzing out hardcore." How much coffee do you drink on the regular?