When Joyce is introduced in the hotel lobby she leaves with the female villain. The two of them leave the hotel with Joyce's boyfriend in pursuit. Suddenly, when they're outside they're no longer wearing their uniforms but dresses.
Frankie tricks the henchman searching for him and his dad by placing his sneaker just barely visible behind the wall and jumps the guy from behind after he shoots at the shoe - falling flat on his face. We then see Frankie doing pushups with both his shoes on again.
At the end when kit flies the helicopter inside the building, the helicopter's propellers swings off hitting the terrorists and splitting them in half, you can see that at that very moment the terrorists are either made out of dummy or clay.