What The Heck Is That?

Although I don't really know when it began, each time Dawsen wakes up I get him out of his crib and we go peek between the blinds to see what's happening outside. He'll usually comment on seeing a tree, truck, kids, a dog or something like that. A couple days ago he peeked between the blinds and said, "What duh heck'n'dat?" I would respond with a very similar comment. Where the heck did you learn that? It's now one of his favorite things to say, yet when the camera comes out it went out the window, as it usually does. Here's the best we could do.