人の不機嫌を察知したなら、なるべく距離をとって過ごす。
不機嫌な人の機嫌は人が取るものではなく本人でなおすもの。

Bad moods
If you sense that someone is in a bad mood, spend as much time as possible at a distance. A grumpy person’s mood is not something to be taken up by others, but to be corrected by the person themselves.