Today, the basement; tomorrow, El Capitan

Emmett demonstrates an impressive toe crimp on a half-inch baseboard... and leaves his parents wondering how the heck he hasn't yet figured out how to bust out of his crib.

9.8 metres per second squared

First ascent up the stairs.

Video footage of the first descent down the stairs is unfortunately not available, as gravity tends to accelerate at a rate slightly higher than the speed at which Emmett's dad can grab the camera.