Haha, you almost did. Let's make a few adjustments...

[Ajax taps the inside of Yoimiya's foot to get her to slide her leg out a bit, squaring up her stance.]

Your legs were just a little too narrow. Keeping yourself square like this and dropping your back foot back a few more inches will ensure nothing'll ever knock you over. There.

[And once Yoimiya's adjusted, he'll shove her again- surely with much better results!]