At The Two Towers Oscar Party in 2003, I was amongst the crowds of "normal" people when the celebrities arrived. Everyone was screaming at the actors (Peter Jackson was back in New Zealand) but I recognized Barrie Osborne, the producer, walking in, talking to someone on his cell phone. I called out his name and he came over, said to the person on the phone "hang on, Pete" and shook my hand.
Yep, Barrie Osborne, Lord of the Rings producer, put Peter Jackson on hold to shake my hand :-)