No he really didn't fake the "sh**" out of him. He was in a bail technique with inside leverage. He did what he was probably coached to do and did a head turn but he rounded it off as well. Not great technique on the break.... didnt get faked out.
Maybe they are supposed to corner differently based on how the coverage is being played. There wouldn't be any point in a square corner - which would be slower - if the the defender is already turned the other way. Get outside and turned as quick as you can - round it off - and show the QB you're open.