So I been watching this video: https://www.youtube.com/watch?v=PBXcaRyHXUw And the guy that is smashing doesn't bring his racket all the way back behind his head and then smash. I thought that was the proper way to smash.
This thread already covers that question: http://www.badmintoncentral.com/for...rnative-to-Lee-Jae-Bok-s-approach-to-smashing