A layup in basketball is a two-point shot attempt made by leaping from below, laying the ball up near the basket, and using one hand to bounce it off the backboard and into the basket. The motion and one-handed reach distinguish it from a jump shot. The layup is considered the most basic shot in basketball. When doing a layup, the player lifts the outside foot, or the foot away from the basket. It is a foul if, during your layup, you hold the other person's hand or push it away to avoid him or her from defending. On the other hand, it is considered a foul if the defender jumps in front of you in the middle of nowhere and you both crash, in this case the defender causes a foul. A layup is very handy and to defend it, you just basically need to stand in front of the opponent with your arms stretched out.