In Exclamation marks^x, Constructions^x

I believe that the ghost that has appeared before me truly is my father’s spirit, and that everything it has said is true. The ghost did not flee before Horatio’s “cross,” rule over my people justly; just as my father did, and just as he expects me to do. Looks pretty good to me. You have...

Was that easy! and Am I hungry! are particularly American constructions. I don't think we have this inversion for an exclamation in BrE. When we use the negative, it's formally an interrogative, so if I say Isn't he clever? it's like asking Don't you think he's clever? However, we often put an...