Get your eyes ready for a busy weekend of visual art and suchlike: 1. Tonight at the Nuart: Bob Rafelson's movie Head featuring the Monkees. See Peter Tork punch an old lady, Frank Zappa insult Davy Jones, Teri Garr wear a prairie girl costume, and Victor Mature destroy a city, and hear the immortal line, "I'd like a glass of cold gravy with a hair in it, please." Yeah, yeah, Jack Nicholson wrote it......