One of the best magic tricks ever 2... Tell me how this was done

There are so many. Since the clip starts right at it, I wonder if we're seeing all of it.

Anyhow, just do a search on "how to get someone to pick a particular card" and, as you can see there are LOTS of ways to suggest, so you'd have to kind of see some different vids with different techniques, and compare them to the trick footage, to tell which one Blaine used.

Personally, I would have used a Svengali deck to nail it. But, Blaine just had Harrison mentally think of it (and seemingly without any kind of leading), vs. physically pick, so that makes it much more difficult.