"How wonderful!" Terry Jones practically squeals as the scene featuring "the Knights who say 'Ni'" unfolds during the recent 40th-anniversary screening of 'Monty Python and the Holy Grail' at Manhattan's Beacon Theatre during the Tribeca Film Festival. Jones co-directed 'Holy Grail', which turns 40 this year, with fellow Python Terry Gilliam, and he directed 'Monty Python's Life of Brian' and 'Monty Python's Meaning of Life', and his joy in re-watching these films is palpable. "I've long since forgotten all the turmoil around them when we made them," Jones says. "Well, I haven't, actually, but what's really important is what's up on the screen for everyone to see, and I'm pleased at how well the film holds up." Seeing 'Life of Brian' in a theater for the first time in more than a decade is made even more enjoyable by the running commentary Jones supplies. When his famous turn as the naked "hermit in the pit" comes, he roars with laughter. "Glorious!" Jones says.