One Handed Cut

Well, first of all the one handed cut is a technique that many magicians use. It can come in handy in many magic tricks. So first off, hold the deck in your dominant hand as shown

Next, let go of about half of the deck with your Lower thumb. Doing that should make the deck look something like this.

Once you have successfully completed step 2, Take your index finger and push up the bottom half of the card deck making it look like so.

Next, bring your thumb back letting the deck go with it and push your index finger back.

After you push the bottom half to the left( if your a lefty) the rest should do its self!