Reminded me of a copper clad convex awning I installed in downtown FW 15 years ago. It focused the sun such that it literally blistered the skin in a few seconds. We had to put up a plastic tarp hung on a boomlift to get some relief, but the sun reflected at the edges and caught the thing on fire! My first realization came as flaming drips of plastic fell on my back and head....
Ah, the Texas sun. I lived in Dallas awhile... when I got there, I took the house plants out of the moving van first to get them out of the way. Put them on the back patio, went back to help with the unloading.
Later on, the truck finally pulls away, so I go to get the plants...
...they're toast.
That must have been a sizable sheet to focus that amount of sunlight to where it blisters the skin that fast. Amazing.