Oh, this he actually knows how to do. Sure, it's minus wheels, but he used to have to this uphill. This is an oddly familiar task and he sort of braces his feet against the ground and goes back into a focused stare. The block moved with same speed Ilya could run and following the vague direction of 'as much as possible', it goes in zigzag patterns, picking up speed as he applies more force to it, then with a furrowed brow he pushed hard at it and the block slid all the way over to the opposite wall. It wasn't without effort, but again, he'd hauled things up steeper inclines for longer periods of time, and he was only breathing faster, not hard.

Moving it around without a destination is a new experience for him, but the wall's as far as anything can go, so he pushes it along the wall's side in one direction, then in another. Experimentally, he picks it up. That's more effort, enough to have him breathing hard, but he can still move it back and forth even at this distance.

"Ma'am? When do I know when to stop?" It's more confusion than exertion. He can do this all day, in the sense that he can force himself to keep going in a life or death situation to do this all day. Still, it's the lack of specific directions that's getting to him.