This is an example of a travelling violation at the start of the dribble. A player who catches the ball while in motion shall release the ball to start a dribble before taking their second step.

In this example, White 25 catches a pass while in motion, his gather step is his right foot, the first step is his left foot and then releases the ball for his dribble after taking his second step on his right foot. This is a travelling violation by White 25.