Smart. The first one she dodges but that second one nearly does the strike. If Mai's first instinct was to throw her own snowball to intercept much the same as she would do with a knife it absolutely would have hit her.

"Gee, I don't know. The one trying to duck behind something?"

The sarcasm in her tone is dry. She's already scooping up another ball followed by a second. If this other person is going to go in dual-wielding then she definitely is too.