late in the night activity...

yep. it happens all the time. after midnight, he let me think he was wrapping up for the day, and actually he starts doing something.

よくあるんです。夜中過ぎて今日はもう終わり・・・と見せかけて、何かが新たに始まっちゃうってこと。

the rear wheel of the F4 has taken off...

アグゥスタのリア・ウィールを外す・・・