Crane - not the flying Species (yet)

Neighbourhoodshot - they were very busy working on this roof all day.
The new upcoming storm, Zeynep here...

I took this photo through the closed window when wind and rain were really bad for a few minutes. Just as I lifted the camera something from the building went flying, only a big plastic piece from the top of the roof, as it seemed.
My attention was more drawn to this piece (whatever it is) hanging down from the crane; it was swinging in the wind and it didn't look good. Seconds after I took this shot they lowered it and took it off the hook.
Good idea.
I hope this crane doesn't learn how to fly tonight. And I'm not the only one in the neighbourhood.

18:35; 10,5°C