that would be a lawsuit waiting to happen here in the US if they don't mark the window. Seriously, had a coworker who lost her little boy because he ran into their patio door and shattered it.
one tiny sliver of glass got into his bloodstream and went to his heart
gawd, that terrible.
I do bumbling moves like that all of the time. Fortunately, even though I'm accident-prone, I haven't had any events lately. Do burns count?
I knocked a screen out of a sliding door once doing that. Fell right on my bum.
I walked into a huge mirrored wall in a club once. I felt a bit silly and confused,and looked round to see a bunch of people laughing. I had to laugh to though.