when you just don't see it coming

Sparrow Aviation Administration Blames Collision On Failure To Detect Pane Of Glass
July 25, 2006

PIERRE, SD—Sparrow Aviation Administration officials are calling the Monday collision of an westbound sparrow with the window of a Mitchell, SD home a clear case of "controlled flight into glass," after the bird failed to detect a transparent windowpane directly in his flight path.

I've had days that felt just like that.