[KneeCo]

I have no idea what the "key" is, but just in terms of the hand, which is a good one, here's my reaction

The way the hand went down, the fact that he delayed his verbal "call" after throwing his chips out contrasted with his meekish before putting the chips in pf verbal call.
+
UTG + hero's image as two players very likely to bluff 3b an "accidental" raise.
+
The range of a tight solid ABC player that makes that pf raise in that spot actually wants to raise in that spot a lot more often than call in it.
=
A very possible fold.