Amputation.

http://filesmelt.com/dl/sunfrome.jpg

you had to deflate his arm and leg huh

I… Don’t get it.

Left leg and arm where amputated

He has no limbs on the left side of his body.

Savvy point there, but some fancy editing one the limbs would assist the humor.
And you left the end joke to the first panel. It works a lot better when you save it for the last.
Build up the joke and the slam it into people faces as the grand finale.