I think it's fine. There are better hands-off 'ACAAN's in this world, which definitely strike harder in every situation too.
Although the trailer shows the best possible outcome, it also shows the most common outcome. The performance has probably not been set up, or else I would indeed think it isn't fair. I'm pretty sure that he originally aimed at this outcome and built the rest of the routine around it (so the rest are just outs).
I was wondering (since I don't have it), for the worst outcome, does he used double-face or face/back cards (I hope you know what I mean, and putting it like that would definitely throw off anyone who doesn't know it

). I really hope face/back because then it works much better, strikes much harder and allows for a little easier solutions too.