Hi, I'm Mike Patrick, and this is how to do a boomerang toss. What you're going to do is, it's very much like holding a card for regular throwing. I always, when I'm doing this type of boomerang toss, I always clip the card from this corner, and I have it in here. You're going to do the same action as if you were to throw a card normally, except you're going to tilt in a little bit more. This gives the card a little bit more. You want it to spin in a space almost, so when you let go when you first start doing it, before you start trying to throw it far away from you, try to get used to keeping the card in a small space, like right here.
Once you get used to doing this, you can go further and further away, and it's really the jerking back action of the hand while combining it with the wrist. It's almost like whipping. So, you do this, and you can cause the card to catch in the middle of the deck. If someone picked a card, you could do a trick where you find it like this. So this has a variety of uses. Also it just looks pretty cool if you can throw the card and make it come right back to you. You can get some substantial distance. Good luck.