I always thought that mushroom looked like it was sitting on top of something that resembles a skull of sorts, a bit of an odd looking skull but still gave me that feeling. Also thought the circular tattoo looked like a screaming mouth on his hand. You can see it in two of his photos. One with child and the other he's taking a selfie in the mirror. Nose above, teeth and tongue in a circular mouth with lips. I may have an overactive imagination though.