Max studies these drawings. So... if he understands how heat works correctly, muilsroo seems to be following conservation of energy properly, here. He's not sure if that's in contrast to it being violated with the sleep thing, or if sleepiness isn't technically a lack of energy, and talking about sleep in terms of energy is an idiom he hasn't examined properly. Max decides he needs to go for a wiki walk on the subject of sleep sometime soon.

But... yes, she can set a leaf on fire by stealing all the heat from a large object... instead of just swapping their "temperature", it's actually moving the energy. So... she warmed up by killing off her mice, stealing their heat and freezing them to death? It seems kind of wasteful, but he nods with understanding anyway.