I too agree that part of the bush be cropped out. By doing so, he won't be so close to the center of the photo--it would position him closer to the rule of thirds.
His left hand reminds me of a skeleton. There isn't enough detail showing because the skin seems to be a tad too dark. To me his left hand appears slightly darker than his right. I'd also like to see a hint more of detail in the back of his neck and his right hand, too (perhaps lighten the skin tones all around wee bit?).
A nice moment to capture! Do you know him?