[wackodave]

I think the hint the guy might be talking about is the bit at the very start of Mulholland Drive where the camera falls onto a pillow. Representing someone falling asleep and signifying the start of the dream.

Edit: Just watched it again, the camera sort of hovers around the bed before settling down on the pillow. It's right at the end of the dance bit at the start of the film. Watching it now it's really obvious but I didn't pay any attention to it the first time I watched the film. I'm not very good at noticing these things so you might have known about it already. Seems to fit though.