super cropping is the shit and i highly recommend it. A lot of people super crop by "pinching the stalk with two fingers and slightly bending it at the same time." This creates a tear in the steam, but it quickly heals with a visible scar. I've done this a lot but noticed when you "bend the steam while super cropping" it alters the angle of the stalk, which i'm not a fan of.
I am a fan of Kyle Kushman's super crop technique, which ill show a video of .
http://www.youtube.com/watch?v=bwGfXTl5zsI (2:30 - 2:42) hope this helps. One thing to mention, when you see him snapping the stalks , he is literally twisting the stalk, what this does is increases transportation of nutrients and also just makes the stalk strong so you don't need support in the later part of flower.