The biggest thing in a pack sprint is you dont change lines suddenly. I'm pretty into squeesing through gaps and crowding people in a pack sprint if I really want to do well.

you can tell when someone is on next to you, you can tell when someone is just behind you to the point you would take out theyre front wheel, but having said that you cant really look back in a sprint.

Just be aware of everyone around you, if you get boxed in you get boxed in better luck next time. If theres a small gap you might need to take a risk and squeez through.

Youll get used to it.