I closed the window

I closed the window this afternoon.  I was trying to go from one cupboard-top to the other.  When the window is closed, I just walk along the top of the adjustable part.  But today, it was open... at least until I got there.  When I got there (or maybe when I jumped off... my human didn't see it happen), the window closed.

I'm sitting in an open window in another room now.