Use the slow/quick motion record feature on your EX1. Set the frame size to 720 and the frame rate to 60fps. This will give you a 50% reduction in speed which actually looks better than recording a straight 720p 60 clip that you slow down in post. I wouldn't call half speed super slow mo. but it's better than nothing. For an even slower shot you would need something like Twixtor to convert it, but any modern NLE should make a half decent slower shot out of something that's already at 50% speed.