Definition of Irony

So I was heading out to the airplane this morning when I saw this! I just had to take a picture of it because it fully defines irony to me. That is an escape probe on the bottom of the plane that lets the very hot overflow water (potable water, not toilet water) drip out to maintain equal pressure in the water tanks at altitude. If this doesn’t show how cold it was in Charolette NC this morning, then I don’t know what does!