Watch the Video Here

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In creating this art piece , you must keep in mind that it is very simple once you have a command over your graphic editing skill.
The first step you start off with is the outline i.e. construct your basic face marking the position of the cheek bones on the face.
Next you are going to place a grey background to help distinguish your tonal variations. (highly recommended). (use a soft brush )
Then after u finished constructing your toned face it is time to add colors. You will notice that this piece does not adhere to conventional coloring of a face (expressionism) but in the instance youd like to understand how to color the face here is an image to guide you along.

Source image : http://www.coolminiornot.com/forums/showthread.php?59294

FLATTEN THE IMAGE

In Photoshop go to :
Next to the layer docker go to channels
Select only your red Channel and follow the step :

filter --> Distort --> Wave
Set the number of generators to 1
to achieve the glitch effect in this photo - you need to select square (top right hand corner)
then move around the first pair of sliders usually around 250 - slider 1
around 500 - slider 2
You can play around with the sliders and randomize to get the look you desire
leave the second

Next select only the blue channel and repeat the steps above
you can also do the same for the green channel as well and voila ! You created your trippy art piece. :D
Thank you so much for reading , let me know if you are stuck along the way and I will gladly help.