Teaming up with friends to play the "two player collaboration" mode, I was responsible for low-level troubleshooting, while he focused on upper level continuous troubleshooting. However, he quickly swapped the wrong key block and blocked the chain path. When I was in a hurry, the "area blasting" I mistakenly placed not only exploded the obstacles, but also made the newly flashed blocks fit perfectly into an L-shape to eliminate them, playing the mistake as a "blasting and connecting" routine.