I met death in a train and passed!

I met death in a train and passed.
I've defeated death!
So I thought, until he came to sit by my side.
He smiled at me and said
"My comrade, can you please push a bit
Since my seat is too small for me?"
I did
And throughout the journey,
We sat together in silence.
Silence is golden,
He whoever minted this speech
Needs to be applauded.
But
Death broke the silence
"Don't you find the air refreshing?"
I tried to pretend I didn't hear
And he was glad to repeat
This time colder than before
"Don't you find the air refreshing?"
"I do"
He looked at me and said
"But its ov..........."