@RippTheRuler
The Trick/Melo drama really started with the Ilja Dragunov trilogy and that first match at GAB where Melo won with Trick's "help" after Drag hit the NXT belt that Trick was holding that led to Melo winning the match. Trick's match with Dragunov was star making moment as well.
This backstage segment shows that in Melo's mind, Trick didn't believe he could beat Dragunov w/o Trick's help but to us as the viewer saw that Trick did believe in Melo.
I feel Melo snapped inside his mind at No Mercy. That's where Melo lost the NXT title and Trick won the NA title. They made sure they showed Melo stare at Trick's NA title to close the show. Then Trick started to get all this shine even after losing the NA title and wanting to go after the NXT title and Melo just couldn't handle it anymore so he attacked Trick to make sure he wasn't in that 4 way match to get a chance at upstaging him again.