We all have a part to play

I was in a H&S meeting all afternoon, i could feel my life slowly and painfully ebbing away.
Just before i started taking notes i looked up at the screen and it said we all have a part to play!
These are the notes i wrote -

WE ALL HAVE A PART TO PLAY

It was up on the screen written in red, Those seven little words they made me feel dead, What am i doing here and what part do i play?, i am sitting at the back behind a number of heads, nobody is sitting next to me, nobody is looking at the back of my head!! Nobody can see me, so what part do i play?......the invisible fool??