It looks like he may have attempted to self-rescue by holding his body up, loosening the ligature. Another possibility to note is he may have also tried to correct the ligature if he felt it was in the wrong place, causing pain, etc. This is an unnatural body posture.

Possibly fake.

Summary edit

DescriptionMiddle-age man found hanging from a tree, Blue Springs Park, Florida (near Deland). - panoramio.jpg	Middle-age man found hanging from a tree, Blue Springs Park, Florida (near Deland).
Date	29 November 2009 (original upload date)
Source	https://web.archive.org/web/20161014092715/http://www.panoramio.com/photo/29363500
Author	Peter Fenton
Permission (Reusing this file)	This file is licensed under the Creative Commons Attribution 3.0 Unported license. Attribution: Peter Fenton You are free: to share – to copy, distribute and transmit the work to remix – to adapt the work Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. https://creativecommons.org/licenses/by/3.0CC BY 3.0 Creative Commons Attribution 3.0 truetrue This image, which was originally posted to Panoramio, was automatically reviewed on 8 December 2016 by Panoramio upload bot, who confirmed that it was available on Panoramio under the above license on that date.
Tags (from Panoramio photo page) InfoField	Volusia County, Man Hanging From Tree

Camera location	28° 56′ 32.58″ N, 81° 20′ 27.87″ W	View this and other nearby images on: OpenStreetMap	28.942382; -81.341074