"It finally arrived!"

"What arrived?"

"My new arm!"

"Your new what now?"

"My new arm! Look!"

"Why did you get a prosthetic arm?"

"It's not a prosthetic. Look here, where it would connect to a shoulder."

Limb Exchange, any limb, lowest price.

"They trade literally everything! I started with an arm, but they had tails, octopus tentacles, you name it! Now can you help me out?"

"How…?"

"Just help me take off my arm. I need to send them one of mine. That's why it's called Limb exchange!"

"Take off your arm!?"

"Obviously. I can't have three."

"But… how?"

"Just watch."

"Ack! You just pulled your own arm off!"

"It's heavier than I expected. Here, help me get the new one on."

"Just stick it on???"

"Yeah, I guess."

"Ok…"

"It worked!"

"You look ridiculous."

"I want to see for myself. Where's the nearest mirror?"