He tried to do this while I was working on this very comic. The only way to stop him from laying down on my chest and subsequently my computer, tablet, and/or sketchbook, is to hold him back with one arm. This still puts a stop to what I'm doing though, because he'll want his tummy rubbed. And if I stop rubbing his tummy, he'll grab my arm with his paw/claws and guide it back to him.
