My Job is killing me!!!!!!!!!

Today I have earned the right to bitch...
I have been temporarily disabled.
My legs hurt from sitting for long periods
My arms hurt from the elbows up
My brain is cloudy and experiencing
temporary memory loss....
All this because my co-worker went
on holiday. Then my boss tells
me today he had to do my filing
which is my job. I wanted to ask him
instead to do my co-workers job so I
could do mine.
He is a total ass at times.