I've been here, long ago. This is a sight you couldn't forget. I feel fairly certain this is the exact bridge I was at - I recognized it immediately. It's in Nova Scotia, Canada. It's called a tidal bore. "A tidal bore is a phenomenon in which the front of the rising tide propagates up a river as a bore, a churning and tumbling wall of water advancing up the river, not unlike a breaking surf riding up a beach." Link shows where to see bores. (original link disabled)
Alexander Yakovlev, photographer, captures the incredible grace of ballet in his "flour series" where he caught on film those little magical expressive and dynamic moments we usually miss watching live ballet.
This photo captures the moment a huge 'supercell' storm reared up like a giant tidal wave, sparking sideways bolts of lightning. Professional storm chaser Mike Hollingshead photographed the scenes in Nebraska, America