Should Have Seen It Coming: Crystal Ball Turns Into An Arsonist

A crystal ball, seen in the middle of the photo is this fire-
ravaged room, set the blaze by focusing sunlight from a 
window onto a small point on the couch, setting it ablaze

 OK, I have to dispense with the joke right away, since it's so obvious.  

A crystal ball started a fire that wrecked a house in Wisconsin.  But whoever owned the crystal ball should have seen it coming. Ba dum, dum! 

I'm sure the owners of the house do NOT like me joking about it, because in reality, it's awful when somebody's house burns down. I only dare joke because I know nobody was killed or injured in the blaze.

According to the Delton, Wisconsin Fire Department, via a Facebook post:

"An investigation determined the fire started on a couch in the living room and the cause of the fire was determined to be from a glass 'crystal ball' ornament. The crystal ball had been located on a table near the couch and in direct sunlight. When sunshine came through a large set of windows and through the glass ball, it ignited the couch."

The crystal ball acted as a magnifying glass and focused the sun's rays so that the energy focused on a very small point, which generated heat, and started the fire.  

I guess it's unsafe to have glass doodads in the house if the sun will shine on them.  You'll set a fire that way.   

Though the fire was mostly contained to the living room of the house, the rest of the place suffered extensive heat, smoke and water damage to the tune of $250,000, the fire department said. 

I wonder if the person who sold the homeowner the crystal ball knew this was going to happen?