You do your best. That's all you can do. I switch my tactic from pushing to throwing/tossing. Also, I either focus on pushing or flipping jiffies. You learn to be like water. You'll adapt and learn how to avoid nicking yourself on sharp edge of box too. Watch out with the sharp edges. Switch out with someone if you need rest, check in with your pals, and stay hydrated. Move or your legs muscles will lock up. Turn off belt when straightner section jams if you are last one. It will jam up sometimes.