It always takes my breath away to watch thousands of Snow Geese (in this case, 70,000 of them)suddenly take off in a swirling whirlwind.
Canon 7D with the 500 f4 lens handheld @ 1/1000, f9, ISO 400, -1/3 exposure compensation.
Full frame without any crop. A bit of colour correction and sharpening.
Cheers,
Mike