Before the panel began, fans were warned to put away all electronics. If any phones were out and appeared to be recording, devices would be taken and attendees would be escorted out of the theater.

Simple enough. That’s typical protocol for movie screenings.

Marvel went one step further.

The studio brought a team dressed in suits who Marvel TV president Jeph Loeb playfully referred to as a few of their “Agents of S.H.I.E.L.D,” a reference to ABC’s Marvel series. Marvel’s “agents” were stationed both on the floor and in the balcony areas of the Main Stage room of Javits’ Convention Center with night vision goggles to make sure no one was capturing footage during the panel.