Safe landings 229 the catcher. According to our simulation, Blaine's momentum is finally stopped by the last box. A larger margin of safety could be accomplished by decreasing the value of either e or w. By changing the width of the boxes to w=>m, our simulation shows that Blaine would be stopped 1 m from the ground Other factors Landing Zone Considerations The stunt person must land on the box catcher for it to be of any use. We est a probabilistic calculation of the landing zone; but since the principle involved are so dependent on the fall setup and conditions, we do not attempt Box and box catcher Construction We made a few key assumptions about design The boxes in the box catcher are held together so that there is no relative horizontal velocity between the boxes. This assumption is essential. If the boxes could shift horizontally, they would likely shift out of the way of the falling stunt person The catcher must also be large enough so that the structure that holds the boxes together doesn' t interfere with energy dissipation. Loose cardboard forms intervening layers between the different levels of cardboard boxes. This assumption is necessary so that any force retransmitted by the top-level box does not cause another box to buckle; requiring one layer of boxes to buckle at a time allows us to optimize box parameters at each layer independently. A layer of cardboard on top of the catcher is essential to guarantee that the impact force of the falling stunt person is well-distributed Following these principles, and using a variety of sizes of boxes(as in equations (10)and (11)), we can tailor the box catcher to each stunt situation. Conclusion notin e present a model of energy dissipated by the collapse of a single box, ng two key The walls of the box buckle and give way to the overwhelming force applied to it. Shearing forces cause tears in the walls, eventually leading to collapse The air within the box is expelled, absorbing kinetic energy of the falling stunt person in the pi rocessSafe Landings 229 the catcher. According to our simulation, Blaine’s momentum is finally stopped by the last box. A larger margin of safety could be accomplished by decreasing the value of either  or w. By changing the width of the boxes to w = 1 2 m, our simulation shows that Blaine would be stopped 1 m from the ground. Other Factors Landing Zone Considerations The stunt person must land on the box catcher for it to be of any use. We suggest a probabilistic calculation of the landing zone; but since the principles involved are so dependent on the fall setup and conditions, we do not attempt this. Box and Box Catcher Construction We made a few key assumptions about design: • The boxes in the box catcher are held together so that there is no relative horizontal velocity between the boxes. This assumption is essential. If the boxes could shift horizontally, they would likely shift out of the way of the falling stunt person. The catcher must also be large enough so that the structure that holds the boxes together doesn’t interfere with energy dissipation. • Loose cardboard forms intervening layers between the different levels of cardboard boxes. This assumption is necessary so that any force retransmitted by the top-level box does not cause another box to buckle; requiring one layer of boxes to buckle at a time allows us to optimize box parameters at each layer independently. A layer of cardboard on top of the catcher is essential to guarantee that the impact force of the falling stunt person is well-distributed. Following these principles, and using a variety of sizes of boxes (as in equations (10) and (11)), we can tailor the box catcher to each stunt situation. Conclusion We present a model of energy dissipated by the collapse of a single box, noting two key stages: • The walls of the box buckle and give way to the overwhelming force applied to it. Shearing forces cause tears in the walls, eventually leading to collapse. • The air within the box is expelled, absorbing kinetic energy of the falling stunt person in the process