@chisroberts.... Thank you for your comment, I appreciate your time and input. I like the "firecracker" idea never really considered it before but sounds worth a try honestly.
The coin is just acting as an agitator to the trichomes and as a weight to push/sift them through the screen. It does yeild more plant material in your kief so shake gently, but it'll increase your kief output a substantial amount... I will be posting more cannabis culture related content in the future so please stay tuned.
Always a pleasure to meet a fellow cannabis professional.
Honored to be a part of the cannabis Steem community.
-Best Regards,
Cannabizzle :)