When I was 15 my parents left town for a month. They hid the keys to the car but I found them. That month I drove my stepdad's Thunderbird Super Coupe into Manhattan every day and I would crank Cypress Hill as I flew around the city racing the taxis.
When I'm home on a break I lock myself in my room and play guitar. After two or three hours I start getting into this total meditation. It's a feeling few people experience and that's usually when I come up with weird stuff. It just flows. I can't force myself. I don't sit down and say I've got to practice.