In this image, you've depicted a sad scenario. So many homeless march to a different drummer and are trapped in a world of delusions and hallucinations. The gestures and body language of the homeless man you documented here evoke that world.
The gestures made by homeless people always seem so fascinating to me. They are usually in their own world and speak and move within their own private scenario. Not sure this guy is singing his hallelujias but it does look as if he may think he is a prophet or something. Interesting capture, Tim!