Inert(I)a

Physics carries a weight,
the gold standard for analogies
envied by economists and biologists
for the sheer repeatability of gravity,

apples fall on the heads of those who
make theory force practice, whether or 
not mass accelerates at the touch;

and who can't relate to being
in the but-, or-, yet-space,

couch cushions determine 
whether you will rise again
in three minutes
or as many days.