In a comment I said:
Yeah, I was looking for this (about "you just wait and see!"); I hear it a lot while watching cartoons with the kids!
I wasn't confident of (on?) which one sounds natural, until checking with Google ngram (watching cartoon,watching cartoons,cartoon,cartoons). Am I right in choosing "Watching Cartoons" which shows up 20 times as much compared to "watching cartoon"?
By the way, in the context above, is it confident of or on. With Google ngram, on is barely noticeable, and of is almost all there is.
Note: You may want to take out cartoon and cartoons for the other curves to be clearly visible.