I know Eddie, he's a great guy!
As to the eddie created by structure blocking current this is so true. To add to this, many times a wash out, hole or depression is created on the backside of said hard structure (sometimes soft) in the eddy which adds to or makes the spot more attractive to said ambush fish. They don't have to exert much energy to hold there and have the perfect ambush spot for bait to be swept to them.