Powerful legs (5)

"Like she said, it's because she has powerful legs. With strong legs, one can stabilize one's center of balance better and have a firmer foundation. With those powerful legs, she was able to stop herself from being pushed back."

I went on to explain a few more things from my past life, things that didn't exist in this world.

Scientific terms such as gravity and such.

However, Erina cut me off by saying, "I know that center of balance is important, I've already learned that from the captain's loss."

There was a bitter smile that appeared on Klein's face when he heard this.

He didn't expect this kind of collateral damage after all.

Then she said, "I was already keeping myself planted, but she was still able to push me back."

The way that she said this and the look on her face was almost as if she was implying something. 

This was all aimed at me, so it seemed like she was suspecting me of some kind of cheating.