Kell wasn't expecting to get his money back. At least not unprompted. So when Lucifer throws him the pouch, he almost fails to catch it. The surprise flashing through his face, followed by a smirk. He doesn't check the content - a bad habit he's yet to ditch - just nods, before putting it into his pocket.

"At least someone had a good experience there."

Kell can't say the same about him. His own was quite the disaster.