For someone who hasn't seen a large structure burn here are some pictures of a controlled barn fire.
Here is a picture of John's old barn. It was structurally damaged several years ago by high winds.
Here is a size comparison of the barn and John.
L.D. dropped by to show us the finer points of his home maintenance business.
It took a while for the open barn to build up heat....
...but once it did it only took a couple minutes to become fully involved.
The old barn burned majestically for 15 minutes or so...
...until it finally gave way...
...and went to the ground.
These pictures are a sobering reminder to the speed and lethality of fire. Have you checked your smoke detectors?