Interesting choice of words. Does anyone remember a Brittish mini-series from the late 80s called Piece Of Cake, about an RAF Spitfire squadron? One of the seminal storylines was a bet between two pilots about flying under a small country bridge. Lets just say the odds turned out to be 50/50.>>>>>
Flying under a bridge like this is a relative piece of cake.
I can tell you how low you have to be to experience a whale strike...about 5'.How low do you have to be to experience a flume strike ?