It's a Monday morning in October, and my partner is fighting out the last moves of his lead. He is far above a nest of small gear on the Eldorado Canyon route Scary Canary (5.12b/c R). A moment later he's airborne. Then—pop, pop, like the sound of a BB gun firing off in rapid succession. His body continues flying halfway down the wall, while the blown placements, an RP and a Ball Nut, spin around his rope. Finally, he lightly impacts the sandstone wall with his feet and hands as he comes to a stop.