Not Namor was going to but Quicksilver who you don't know is a good guy is about to leave with Stark. So feel free and try and stop him but he does have that cattle prod and will use it then apologize to you later. His goal is to get in and out with every prisoner as quickly as possible and then stop by and help Thor and Carol. He also needs to look like he is still a guard though so if any hero tries to help him or get close to a prisoner he has to stop them. Only about half the people showing up know he is really a good guy. This confusion might end badly if any of the other good guys can land a hit on him so he has his weapon ready.