I want to know if I've got something right about the nose pinch RC:

I realise when you move your eyes in a dream your real, waking eyes actually make that movement. When you try to breathe when pinching your nose (in a dream) does your body actually do the breathing you do in a dream?

The way I do nose pinch is to make four of five quick inhalation/exhalations while pinching my nose. Will my real breathing actually be the same as that?

If I assume this is the case, then could holding your breathe be a simple RC? In a dream you could simply stop breathing and if the dream starts to decay you'd know you're dreaming?