Hi,
1. 怒りのため、着地で勢いあまって突っ込み気味になり、 箒から降りる時も少しよろめいた。
I am not certain of the grammar around 突っ込み気味になり. Is 気味 a suffix attaching to the stem of 突っ込む? Is 突っ込み気味 a noun phrase? Is the sentence (literally) saying that he became in a state of 勢いあまって突っ込み気味?
2. ロンとハーマイオニーが何事かと様子を見に、芝生を横切ってこっちに向かっ ていた。
Is と quoting 何事か, meaning that the action 様子を見に was performed as if to answer that question? Does it imply that they actually said 「何事か」?