Arg0:agent, cause
Arg1:experiencer, thing made crazy
Arg2:instrument
[*] crazed [*-1] by the weight dragging , the dust , and the heat , the horse leaped our wall , [*-2] dashing out the rider 's brains against it , a\ nd leaving him lying there among us -- while the horse crashed away through the brush .
Framed by Neville.