I took this video last week of Beeps. He was quite excited, doing his special whistle and saying "pretty baby!" and I wanted to get it on video. When he saw the camera, he got even more excited and started doing his head snaking and marching around. Had I continued much longer, I would have risked a bite.
He usually does the whistle that I do here, then follows with "pretty baby!" but the camera alters his behavior. I did the whistle, trying to get him to end with "pretty baby!" -- this worked twice while I filmed, but usually has a much better success rate. The camera really does trigger him!
As soon as I removed the camera from his sight, he stopped his menacing behavior.