I don't live and sleep or lay on the couch and watch TV on a bridge, or a plane for that matter.

I realize I am over reacting, or not, but there are odds here, and I understand the benefits.

I have never considered it being used in residential and I have drilled into a slab or two in the past.

In the future I will investigate before drilling.

Still that is a lot of stored energy to be sitting on.