In the trailer we know Felicity asks for help, although it seems unclear why. Isn't it kind of obvious they need an assist when he showed up and they were under lock and key? Unless they've been reading 50 Shades of Nanda Parbat, I think help is a foregone conclusion despite his brushing it off with, "I think you got this."
Barry saunters into the room as if showing up was no big deal. WAIT!! For the Flash, it actually ISN'T a big deal to get to Nanda Parbat! On the other hand, I'm still wondering how Malcolm Merlyn managed to get back and forth three times in one day. Is he a flash, too???
The Flash is feeling proud and strong, and rightfully so. Taking out a gaggle of League members and leaving their weapons scattered on the floor while they're in chains waiting to be lit on fire is no small feat for the average man!
Barry Allen aka The Flash has that look of steely determination in his eyes that he gets when he's formulating a really great plan. Of course, he had one of those when he raced toward Gorilla Grodd, too, and look where that got him.
Despite believing they were left for dead, apparently Team Arrow is going to let Barry hunker down in front of the door for a good minute or so while he poses for myriad photos before rustling those chains and thinking of a way show some good old Team Arrow hospitality and gratitude. Surely, I jest.