1nv1nc1bleA little while ago, Invincible was on Mars. And then he was in the Bar, with very little travel happening between (it's Milliways; it happens). Then, he had a conversation with Jay, who suggested that he get some rest. Now, the thing about being Viltrumite is that, when you stop eating, or sleeping, your body doesn't mind, because it can do that for a while. That's part of being a Viltrumite and part of being Invincible. But, the body of a Viltrumite knows that the brain can be annoying about things like hunger or exhaustion, so it stops talking to the brain about those things after a while, until the Viltrumite in question is someplace where issues like hunger and exhaustion can be addressed.
The long and short of it is that, once Jay mentioned that Invincible should get some rest and he got a room key from Bar, the body informed the brain how long it had been since real sleep (more than ten days), and Mark Grayson was asleep almost before he got his boots off.
Given the timelessness of Milliways, Invincible isn't sure how long he slept, but he felt much better after waking up. A quick shower makes him feel even better, and while his uniform hasn't been washed and still bears stains of Martian regolith, it doesn't smell particularly funky. Art the Tailor does good work, and the materials that make up Invincible's uniform shed dirt and odor.
Now that he's rested, Invincible's body has decided to inform his brain that the last thing he ate was a tuna salad sandwich, frozen by the vacuum of space. And that was a week ago. Cue on teenage superhero, working his way through a massive plate of eggs (over easy, topped with Tabasco), bacon, ham, sausage, hashbrowns (covered in cheese), toast (for sopping up egg, of course), pancakes and syrup, and half a box of some sugary cereal that has a humanoid dog in a jetpack on the front. With more enthusiasm than manners.
Botherable, if you don't mind him talking with his mouth full.