Halfway to Banks, we found a monstrous standing wave in the middle of a nasty stretch of rapids. The rest of the group, all of which had the HJ241 drives, defeated the big roller. But Johnson’s boat with the HJ212 drive could not climb it, though we tried. We got stuck on the face, engine red-lining, bow in the air, literally going nowhere fast. So Johnson deftly spun the 24-footer to the right and raced back down the rapids to a pool below.