There are many tutorials out there for making a logo or text turn into smoke or sand.
So, if you searched for
text to sand or something similar, you would probably find a few tutorials. However, instead of using text, you would use your image of the guy.
Here is another tutorial for disintegrating a person into Particles:
[link] Of course, you would want to adapt it to fit your needs.
- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')
No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.