This is an example of a travelling violation at the start of the dribble. A player who catches the ball while standing with both feet on the floor cannot lift their pivot foot before the ball is released for a dribble.

In this example, Black 20 catches the ball while standing with two feet on the floor, jumps with both feet off the ground and then starts his dribble. Jumping from the ground causes Black 20 to lift his pivot foot before releasing the ball for a dribble. This is a travelling violation by Black 20.