Danson: I'll tell you about the worst day of my life. Shelley and Rhea were carrying that week's episode, and the guys were just, "Let's play hooky." We'd never done anything wrong before. John had a boat, so we met at Marina del Rey at 8 a.m. We all called in sick, and Jimmy [Burrows] caught on and was so pissed. Woody and I were already stoned, and Woody said, "You want to try some mushrooms?" I'd never had them, so I'm handed this bag and I took a fistful. On our way to Catalina, we hit the tail end of a hurricane, and even people who were sober were getting sick. Woody and I thought we were going to die for three hours. I sat next to George, and every sixty seconds or so he'd poke me and go, "Breathe." [gasp] And I'd come back to life.
Harrelson: I was a little worried about him. It looked like his face was melting. I think I may have been freaking a little myself, but I had to be cool about it.
Much more here!