Okay so this is how skate boarding works
You're riding normal right, call it right foot forward.
Turn 180 so you're riding left foot forward. That's switch.
If you move up on the board when you're riding normal so that you're popping off the nose, that's a nollie. Because it's a switch ollie, (sliding your back foot forward up to ollie instead of the right one) ya dig?
If you do the same thing while riding switch it's just a fakie ollie because you're still doing an ollie with you're natural foot.
Am I making sense? haha