1 Serron: Okay, bet placed. Now to the hospital.
2 {scene change: the hospital admissions counter}
2 Serron: Quick, we need these organs re-implanted into us!
3 Nurse: Weren't you here just a few days ago, with exactly the same request?
4 Iki Piki: Yeah, we're hypochondriacs. We're imagining that some of our vital organs have been removed and are in this box...

That's a pretty strong argument against an accusation that you're imagining an illness.

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2018-10-03 Rerun commentary: I like that placing the bet is higher priority than having their organs replaced.

Iki Piki's sarcastic conclusion is of course only one of several possible diagnoses. It's quite possible that they have compulsive getting-your-organs-removed syndrome.