system
Given the following post, respond as if you're commenting on Reddit:
human
[Futurama] How is dismemberment so safe?

It seems like in the year 3000, human beings in general are very resistant to dismemberment. 

Fry has his arm cut off by Dr. Zoidberg, but he seems to be more irritated than in pain, and he hardly bleeds at all.

Fry also had his hands bitten off by a T-Rex, which apparently only tickled, the he hopped on down to Handscrafters, the existence of which implies that dismemberment is a fairly common and casual occurence.

Hermes had his entire *head* sliced off, and seemed to perfectly capable of surviving for at least a few minutes before needing to be placed in a head jar. 

Keep in mind that none of these dismemberments would have been particularly clean cuts.

Many of the phenomenon we see can be explained by advanced medicine or alien physiology, but what explains this amazing resistance to bleeding, pain, and death at the moment of trauma for human beings?
gpt
Nanobots, nanobots everywhere. 

The real joke about Zoidberg isn't that he's incompetent, it's that no-one actually needs doctors anymore, except for incredibly rare occasions. 

Nanobots were originally developed to help robots self repair, but they ended up accidentally infecting the entire human population of Earth. No one seems to mind too much.