Andrew Sandoval wrote about the November 6, 1968 premiere in his book, The Monkees: The Day-by-Day Story of the '60s TV Pop Sensation:
The Monkees travel to New York City to attend the premiere of their movie Head, which is held not in a cinema but rather at the Columbia Pictures studio on West 54th Street. A party is thrown afterwards for guests including Janis Ian, Andy Warhol, Boyce & Hart, Carole Bayer, Lester Still, Bert Schneider, Bob Rafelson, Peter Fonda, Peter's brother Nick Thorkelson and his grandma. A discotheque is set up and a room that includes small television sets playing portions of the movie. (The group stay at the Hilton Hotel.) Bob Rafelson: "The night Head opened they arrested [Jack Nicholson and myself]. Our opening - and there we were slapping stickers all over New York about the movie. The producer and director on 57th and 5th Avenue. I see a guy about to get arrested for selling chestnuts on the street without a license. So I went over and said, 'How much for the chestnuts?' and the cop said, 'He can't sell you the chestnuts.' And I said, 'I'll just give you the money and you give me the nuts and then no one breaks the law.' "Now, while I'm having this dialectic with the cop, who has a white helmet on, Jack is standing behind the cop trying to slap a Head sticker on the helmet. And like a Laurel & Hardy comedy, man, this cop turns around just at the right moment and Jack nails him on the side of his face. Bam! We're handcuffed and up against the walls. A squad car takes us away. We've got a flick opening in an hour. I just wanted to call everybody and tell them we're in jail. And to get on the radio and sell tickets - because Jack and I had this feeling that no one was going to see Head."