Here"s what actually happened and why Apestyles did what he did:
He called the flop - although the exact hand is irrelevant villain flipped pair of
with
in his hand.
Preflop decision: "At the moment, I"m paranoid about a big hand from a tight player. I could be up against anything from 66+ AQ+. he has 54 BBS, and he could 4bet a large part/all of his stack. When you get 54BBs of your stack in pfr early in a tourney with JJ vs a tight player, you"re usually behind. But, raise folding JJ here is terrible because it kills the value of our hand. It"d be better to raise him pfr with say 10-9o if I am going to fold to a 4bet. In situations where your opponent will shove or fold, re-raising with good hands not quite good enough to call all in with is bad because it turns your hand into any two random cards (simple when explained by a top notch player I guess)
As mentioned above by Paulie, Apestyles goes on to say "there"s also less value in raising with JJ here becuase it causes hands that I can extract value from to fold. He"s probably going to shove/flat AK+ and fold AJ/AQ. If he flats his monsters I will have to cbet the flop worse hands will fold (AK) and better ones checkraise me all in. Also when the flop comes an A or Khis range is way ahead of me, and I won"t be able to proceed past a cbet. Flat calling keeps the pot small against a strong range, disguises my hand, and has large implied odds when I hit a set. I call"