Poetry Bus :"Long ago: At the Barn"

We have been asked to describe a dumb drinking experience:

Deep evergreen shade
a warm beer is pulled from behind
the car seat under a shirt
two swigs become four.

Back through  huge sliding red doors
to finish shoveling sawdust
for fourteen stalls
sticky air builds.

Crank the feed room radio
rock and roll twists with handles
of the wheelbarrow
more and more.

At lunch another warm beer
where two swigs become four.
Finally at four
several of us ride out down the road

On one turn a dog sneaks out
launching a silent attack
on a horses back leg;
I fly off breaking my collar bone

with that and my shame
I have to walk home.
After the hospital
By eight o'clock,

two swigs have become four;
and then many more.