I've done this exact test in Kerbal Space Program, except that I put the parachutes symmetrically. Also, the parachutes deploy at 500 meters by default. Looking at this and seeing the exact same behaviour makes the game feel really natural. Like if this was just an offline rendering of my in-game launch :-)
Fantastic, though I'd be interested to know what the G-loads were during the small tumble after separation.
crazy how quickly that little thing moves. wonder if it was intended to be so close to shore?