In toss juggling, a claw (also called a snatch) is a trick where the hand throwing or catching a ball is turned upside down so that the palm of the hand faces the ground.
The effect is that of the jugglers hand appearing to snatch the ball out of the air.
For example, the Boston Mess can be juggled with each right hand throw as a claw.
Many other well known juggling patterns incorporate claw throws or catches.
In most instances, both a throw and subsequent catch are performed as a claw.