I've always wondered where this saying originated? I understand the meaning as an 'event of acute embarrassment or discomfort'...Allow me a minor thread hijack to regale you with mine...
A few years back, the Wife instructed me to climb up onto the house and clean off the plate glass skylights over the cathedral ceilings in the living room...Now, this roof has a 7 1/2 pitch, with a 30' drop into certain death, but I bravely and dutifully complied....Extension ladder, a roll of paper towels, and a can of Windex, up there I cautiously scampered.....
She stood down in the living room looking up through the glass and giving me hand signals as to the locations that were not satisfactorally cleaned to her high standards...and I would attempt to perform said pointings....Well, as you can imagine, after about 15 minutes of this, me risking my Life up on a death roof, and her safely in the living room pointing out my missings....I had just about enough...
It was about then her ancient Mother came tottering out of her bedroom and employed herself in the cleaning observation in a Senior managerial function.......I was not aware of her prescience since I had stood up and dropped trow and proceeded to perform a 'Pressed Ham with Fruit Basket' upon the skylight! Not just a quick flash and go either...I sat there and lit a smoke and wiggled around enjoying the treetop neighborhood view, while My Wife and her Mother were below looking up!....
Well, I certainly handed them both my @ss on a plate that day! She came roaring out on the back deck just freaking apoplectic! She did not get the humor or appreciate the irony!...after I dodged a few shots from her .38 by hiding behind the chimney, when she was reloading, with her Mother handing her shells and calling out windage,, I briskly slid down the chimney and bravely ran off into the woods!...
When things settled down, I did have to go back up there and eventually mop off the skylight imprint.....Like you said, it was pretty huge...there was a brown streak going right down the chimney too, but I left it there......Creosote I imagine...
(true story)