Yeah, Northbound has the advantage of not using something taht Flight 204 did use. I did not find anything wrong with what 204 used, but some might. It was one of those uses of a gimmick that you would never have thought of. Like using a TT to make a card float, lol. But some people would be put off by it, but personally, I loved the aplication.
Any who, for Northbound, it eliminates the afformentioned something, and is virtully impromptu, actually, it IS impromptu depending on the vanish you use, and one other subtlty that Sean uses. Though this "subtlety" is not impromptu, it is a great convincer. BUT, just saying, for those times you don't have it "set", you can still do the effect almost identically, as long as you are wearing a necklace, and have a ring to borrow.