Erik drops the Logic Bomb of the Ages:

On Hackey Sack

How the hell did stoners get so coodinated?

Stoners store their unused coordinative skills and energy for the time and place of their choosing, just like everyone else. We decide when it's best to physically exert to accomplish goals.

What everyone else does not do, of course, is engage in activities that contribute to the effectiveness of that storage effort in such a way as to still allow future physical exertions of relatively high intensity and dexterity. We sit around in living rooms all evening, conserving our energy and maintaining limber minds. We don't needlessly abuse our bodies with exercise that can hurt our joints and tendons. Other than the deleterious effects of The Munchies and spine problems induced through too much sitting down, we're ready to rock. Even the lung capacity issue can be overcome.

So when the day that glorious Hacky Sack is unexpectedly produced for a band of potheads, they are ready and willing to purge themselves of the overabundance of calories in their systems and exploit the flexibility of the art we've honed: Doing Nothing.