His is a watercolour and one of my favourite pieces of all.  I like paintings that capture people, that make them question things around them or question themselves.  'His' does that perfectly.  It questions trust between two people.  Will he really do that to him? Is he just testing that trust? Could you trust the person you're with enough to just stand there like that? Could the person standing there trust you that much? Moreso?  There is nothing, but nothing more valuable than trust as an absolute.