What would it be like if we brought pigeons into outer space? Well, you'd have a lot of crazed and confused pigeons, that's what. How come more of our space budget can't go towards projects like these?
Quick pedantry: the pigeons aren't technically in zero gravity; the effect is actually an illusion, achieved by inertia from the plane's parabolic path. Okay, now back to watching those goofy birds be goofy! [The Daily What]