Superlek mentions in this interview that he knew exactly when Haggerty would throw the right hand (video 1). Fantastic preparation by Superlek
video 1
Typically Haggerty uses his lead hand to pull at the opponent’s guard to get them to defend or draw out a hurried counter. But instead, as soon as Superlek felt the lead hand trap, he would counter with an elbow.
Superlek uses Haggerty’s hand trap as a trigger for his rear elbow