I've seen things like this before. One that comes to mind was during Michigan's 2010 gubernatorial campaign when Democrat nominee Virg Bernero showed up at a rally for Republican nominee Rick Snyder. Bernero's intent was to create a confrontation. Snyder diffused it by inviting Bernero to join him on stage and turn the rally into a joint Q&A, which reflected well on both men and was actually much more informative than a media-moderated debate would ever be.
But the potential for trouble in that situation was not what it might have appeared to be here. I watched the video once and suspected that "Now This" had staged the whole thing. But a little more research generated enough independent coverage that I'm convinced this really happened. We need more of it, but this is an excellent start:
