Looks more like he ripped open his last bag of cocaine and is desperately trying to snort up what he spilled. That actually happens. What a respectful drug.
Or maybe he couldn't bear the bright white concrete of a thousand suns and was desperately trying to find his sunglasses but then a stray bullet caught him in the leg almost leading him off the edge, but just barely made it by pivoting his shoulder toward the ground and in that moment he was grateful for his life and wanted to truly understand the meaning of his existence as yet another bullet decimated his spine.