Well, seeing as it is completely a fake image, it is a null set. The original picture would surely show the cloud feature above the ground.

Tornadogenesis is really complex. Still, some of it comes down to the conservation of angular momentum.

You have a broad, rotating updraft. That's the thunderstorm itself: that's called the mesocyclone. Where that is particular adept at pulling in warm, moist air, where the updraft is strongest, the local conditions that determine cloud base height change, and a lowered cloud called a wall cloud forms. That rotates too, and faster. If the updraft become even more focused, through the interactions of subtle boundaries set up by wind hitting the back of the storm and outflow from the rain, it can isolate a small area of low pressure, which has an innate rotation from inertia. This keeps the area small, and the low can be strengthening by increasing the speed of rotation. That's where the funnel cloud/ tornado comes in. The idea is something like this.

That's leaving a lot out, but the point is, your wall cloud won't come to the ground like that.

Ok, so I lied. Once and a while it does. Case in point: the Manchester wedge.. Fortunately for most people, and unfortunately for cuweathernerd, that doesn't happen often.