Appropriate Exclamations

In the past three days, I have accidentally used two exclamations in very topically accurate ways. By "accidentally," I mean that I used the expression, chosen randomly, and then noticed how it fit.

First was at the grocery store, when I ran into a friend, who was carrying a basket containing several cans of green beans, those onion things, and a pie pan, among other things. I asked if he was going to be making green bean casserole, and he said that he and his housemates were going to make a whole holiday meal. I said, "cool beans," and then groaned at myself. I don't even use that expression frequently.

Second was just a moment ago, when I was doing some of my homemade physical therapy stretches for my formerly sort-of-broken toes, which still hurt after four months. "Six to eight weeks, my foot," I said, choosing to forgo mentioning a more vulgar piece of anatomy. Ha.

I suppose, due to the randomnity of slang, we could do this in a lot of situations, but don't:
"Hey, it's snowing!"
"Cool!"

"This vacuum sure is effective."
"Yeah, it really sucks."

"Dam, this is the biggest water retention facility I've ever seen!"

And so on. (If you can think of a good one, put it in the comments!)