Following a spanking, Radio has tugged Gabe forward by the collar of his gi, to look him in the eye and be intimidating. Gabe's star wars undies are over his head in an atomic wedgie, and he is bent over with his bottom sticking up behind him. Arryn is standing behind Gabe, helpfully dusting his spanked and wedgied rear with baby powder in anticipation of the diaper Radio's about to put on him much to Gabe's horror.
The sign in the background is a foreshadowing of where Gabe is about to end up. It's like a siren call to the gallows of diaper-dom.
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