UNLUCKY number

I was checking every room, making sure no one is about.
I checked every floor, and found out that no one is in the building.
I pressed on the lift, and waited for the lift to reach the 84th floor.
The door opened, and I stepped inside.
It went down..
Down..
Down.....
And reached the 52th floor.
A gorgeous lady stepped in.
I was wondering why was a gorgeous blonde in a dark building at a time like this.
Then when the lift reached the 13th floor, everything went out.
I thought.. : " Thirteen.. 13!! It's the UNLUCKY number!"
A smell spreaded throughout the lift, a smell that spelled D-E-A-T-H.
I was shivering, and for one second I thought I peed on my pants.
The light came on and the blonde was looking at me and said...
" Sorry, I just farted.. "