More Photoshop Masking. 2 The Brush

I have this photo of Herman Munster,

and I want to put this lightning in the background.

I open the Herman photo in Photoshop

I then drag the lightning shot from my desktop into the document with Herman in it.

I resize it and hit return.

I then drag the lightning layer below the Herman layer.

Now with the Herman layer highlighted, I click Add Vector Mask.

My layers now look like this.

With the Layer Mask Window highlighted, I select the paintbrush, give it a fairly low hardness, and paint out the parts of the Herman picture I don't want to see.

My layers now look like this:

And my picture looks like this: