The Miracle Mattress ad has been pulled from its Facebook page already, but continues to live on YouTube.
In the video, three employees are seen spoofing the fall of the World Trade Center towers on September 11.
The company even called their sale the 'Twin Tower Sale.'
As you can imagine, a lot of people are now outraged by the ad.
The store's owners, who are based in Houston, have apologized for the ad.
The owner says it was "tasteless and an affront to the men and women who lost their lives on 9/11."
The store is now closed indefinitely.