How to throw cards

Why do I keep failing so badly at this

I fail at life... :(

I was too strong, my fist is now stuck in my armpit.

Feel like Twisted Fate.

Guys, I already knew this and I GOT IT TO FLING VERY FAR, STRAIGHT, AND ACCURATE!!! I've even got 1 card stuck to a dart board and I've dented cardboard, I feel happy :3

My uncle taught me how to do this. When you get the hang of it you feel pretty awesome