I'm on my way out of the casino gift shop, having just bought some potions of water and a few other other overpriced items. I've been nice and respectful to the place up until this point. However, a ratling duelist stands right in front of me while I'm still in the doorway, says "I challenge thee!", slaps me, and starts right in with an attack that leaves my sword flying backwards (east) into the shop. The shopkeeper says "Thank you!" and places my weapon among his wares.

Well, as soon as I'm done taking out the ratling, I march back into the store to get my broadsword of devastation (+5, 5d7+12) and now it turns out I have to pay 300k if I want to walk away with what's obviously rightfully mine. Now, I could have coughed up the gold if I really wanted to, or I could have left the sword there, seeing as how I had some other pretty nice weapons with me. But it's the principle of the thing, you know? So I killed the shopkeeper and then everyone else on the level.