Perhaps not wanting to be left out of the good times being displayed by their Argentinean counterparts, someone just uploaded a compilation video of US Air Force pilots purportedly in Afghanistan and Iraq trying some close shaves of their own. DUCK!
When measuring how insane a flyby is there are a few factors to consider beyond just distance from the ground. There's type of aircraft (in this case F-16s), where they're doing it, and just how much crap they'll take from their commander if the video is ever leaked (assuming the commander isn't the one doing it).
By these measures, these guys are both skilled and a little nuts.