The guy at the back is trying way too hard.  The tats, aggressive gesture and automatic weapon all point to him having a need to over compensate to prove his toughness, most likely to himself as much as others.   But that guy in the front – damn! – he’s looking straight at the camera holding Elmo and not looking one bit concerned.  Seriously, if you’re walking around the back streets of an urban city and some guy jumps you with just a stuffed toy – GIVE HIM ALL YOUR MONEY IMMEDIATELY – guys like that are off the scale.