system
Given the following post, respond as if you're commenting on Reddit:
human
[Scooby Doo] How are Scooby and Shaggy thin despite eating so much?

Shaggy and his canine friend, Scooby Doo, can eat insane amounts of food in a single sitting. They don't always eat the healthiest foods. How are they not 300 pounds?
gpt
Shaggy is constantly running away at the speed of Scooby. Great danes can run at 30 mph which is faster than Usain Bolt. Whatever calories they intake are quickly burned away by them constantly running at such high speeds.