When people are bluffing they blink excessively sometimes….pretty sure this is what David Kitai picked up on with these calls against Andrew Chen. Pay attention to Andew Chen’s blink rate at 3:40 on the second video it is out of control, this is why I wear glasses…it’s not a sick read it’s a simple one check it out next time you are at the tables…
https://www.youtube.com/watch?v=7TTpWqbluzA
https://www.youtube.com/watch?v=n5-jtShi60M