At 11 seconds in something that could be a large bird speeds past the wing of this landing plane. There appears to be a sound connected with it and passenger reaction. Is it a bird, though? The plane seems to react to it much more violently that one would expect, given no impact. So what was it. One thing is clear: it’s unidentified.

Story Source:
http://www.youtube.com/watch?v=GMCD5CUYePI