One-Frame Movies

One of the things that makes single panel cartoons interesting is, even though it looks like only one drawing, a single-panel cartoon has a past, present and future. The cool part is where you choose to drop into the story. Take this one for example:

Okay, it's a dog. And he's not wanting his person to leave. But the fun part is what you think is going to happen after this panel, like the guy attempting to walk out the door while shuffling his foot with a dog sitting on it. Kind of like the scene in "The Jerk" where Steve Martin drags his dog down the street.
So, I kind of think of myself as a maker of one-frame movies. They've got a plot, they've got characters, they've even got dialogue. They're just really, really short. Like my thought processes.