On a serious note... Several snapper models are made to do that. Their rear engine riding mowers have bars on the back to stand on. And their tillers have bars on the front to stand on.
But - on their tillers, the carb float sticks open when they're up like that. If the fuel tank is over 1/2 full, fuel runs into the cylinder, rinses off the rings, and mixes with the oil. Dad used to have an equipment rental yard, and had several of the snappers. They were great, until they got propped up on end with a full tank. Then it was time for a new engine.
If I was you, I'd check the fuel system and oil over carefully after that little trick.