SRL for [crazed]: [*]-1 [crazed] [*-1] by the weight dragging , the dust , and the heat , thehorse leaped our wall , [*-2] dashing out the rider 's brains against it , a\ndleaving him lying there among us -- while the horse crashed away through thebrush .
ARG-0: by the weight dragging , the dust , and the heat