Just tried his test case and at first I couldn't reproduce it at all. On my iPhone 4S, you have to do the second finger tapping quite quickly for it to go wron

Just tried his test case and at first I couldn't reproduce it at all. On my iPhone 4S, you have to do the second finger tapping quite quickly for it to go wrong -- just touching it the way he does in the video is not triggering it for me.