That the handle is detachable obviously, I realized for the first time yesterday, when the pan when flushing spontaneously detached from the handle and struck me a deep notch in my almost new countertop. At least it did not happen during cooking, so no food in the pan and the pan was not even hundreds of degrees hot. I do not want to know what would have happened and how it would have looked like in this case with the injury / fire hazard.
Today I had the (supposedly again permanently mounted) handle suddenly while cooking in the hand. The pan was on the hot plate and the handle (the contact point to the pan when the pan heating naturally also very hot is) could no longer be in this state naturally assemble. Enough experimenting, into the trash it.