うちの周りを草刈りしてたら襲われたので注意してたら
戸袋に キイロスズメバチの巣がありました。
なっとく！
As I was attached by some Japanese yellow hornets when I was cutting grass around our house, I was paying attention to find their nest in a tobukuro (a boxlike compartment to store shutters).
That explains it!