Force 10 from Navarone1967

Mallory:
[thoughtfully] Miller, what would happen to the bridge if that central arch were suddenly hit by several million tons of water?

Miller, Barnsby:
Water?

Mallory:
I think we've been talking about the wrong target. Remember that dam we passed by on the way up here?

Miller:
[suddenly all ears] Dam? What sort of dam?

Barnsby:
It's just up the road, about half a mile that way.

Miller:
Well, my dear chap, why didn't you say so before? Oh, I could do a tremendous job on the dam! See, with the dam, you've got your natural elements working for you. It's like having an enormous bath - what have you got to do? Pull the plug!