the final result can be different each time depending on the brush you use and to the distance up to which to expand the edges of the subject,
to make this effect you have to remove and change the background to separate the person from the background.
This tutorial will help you also to understand how to make an infinity war disintegration meme.
in this link you can find the same brushes
here you can find the same picture
Soundtrack: Silent Partner – Don’t Look
If you liked this effect, you could like an evolution of it