Crowley's smirk transformed into a snicker as his eyes began to close.

"I always wondered why they ended up naming them 'safety pins'."

His voice was beginning to take on the lazy drawl of one fighting back against the evils of sleep, or the goodness of sleep, whichever it was, so Aziraphale's question was answered with dulled senses and far too truthfully!

"Once, a few hours ago."

The currently not-so-wily serpent admitted.

"On a park bench."