Leaps Tall Railing in Single Bound

I screwed up. I threw a kitty treat from over the hall railing down to the landing when Billy was at the landing end of the hall.

He leaped up to the railing ... looked down ... measured the distance ... and dove head first seven feet straight down in pursuit of the treat.

Then again, he hit, snarfed the treat, and bounded back of up the stairs for another one, so his genetics (not mention four years of practice) are not for naught.