 You might have missed what he said there. The Corps attempted to use a thunderclap cannon to deter birds. That's a gadget that produces a loud yet harmless boom equivalent to a 37-millimeter cannon. Townsend says it worked at first, but eventually, the geese figured out it was just a sound with no associated danger. We really didn't see that much of a difference. And so you just don't see us doing that kind of preventative stuff anymore. Really, it's just that natural wave action.