"how many of you have actually® adfenestrated"
A story in TIME towards end of WWII illustrated the dangers of adfenestration. A GI concealed from his family that he was close to discharge, intending to "surprise" them. He arrived in his home town about 2AM. He knew there was a broken latch on a rear window, and entered without difficulty. He crept up the stairs, threw open his parents' bedroom door, turned on the lights, and yelled:"Surprise!"
Was he surprised. His parents had moved.