No, he's not pushing the 'nip (although if he realized how much control he could exert over El Gato by becoming her pusher, he might); he has just learned a bit more about the physics of moving furniture.
This started with the hamper.
Between our bed and the wall, there is just room to place a wicker clothes hamper. This serves 2 purposes; it holds dirty clothes and it blocks the access to 'the cubbyhole of doom'.
('The cubbyhole of doom' is a small, cat sized cave between the bed frames and the wall. No matter what we do, there is always a gap and the cats go in it and we live in fear that they'll get stuck or squished when something moves. The cats go in there and refuse to come out just to freak us out)
Well, La Doof Kitton, in a moment of clumsiness, stepped on the lid only when climbing onto the hamper. The lid wedged down and he rode his elevator of the hamper lid down to the floor as he and the lid shoved the hamper away from the wall.
He was thrilled--he not only got behind the hamper, he opened the door to 'the cubbyhole of doom'. He explored this new skill and learned that if he squished himself against the wall, he could fit between the wall and the hamper, slither down to the floor, then shove with all his might, moving the hamper.
He now repeats shoving the hamper away from the wall at least once a night.
The next day, as we were, once again, doing the dance of "chase the kittehs out of the laundry room", La Doof Kitton, as usual, climbed under the drying rack to avoid capture. He decided to see what happened if he used his new-found 'pushing' skills. He immediately discovered that mom is lousy at figuring out what to do when the entire drying rack of clothes moves itself around the laundry room. He was to squirmy and quick to grab w/o dumping my clean laundry onto the floor. The rack itself tends to collapse when you grab one it (leading to the same problem--clean laundry on the floor (and heaven knows that if there is one speck of dirt on my laundry room floor, a clean, white article of clothing will land on it)).
I had to, one at a time, pick up each article of damp clothing, lay it on the dryer, then pick up the drying rack, extricate the kitton, deposit him under a laundry basket for a few minutes (I'd have simply dumped him on the wrong side of the door but then he'd just weasel in when I left), re-hang my clothes, and then take kitton, laundry basket and myself upstairs.
I believe a knowledge of physics simply makes him dangerous--heaven knows he'll use it for evil.