It's interesting that she clearly doesn't consider the hat useful, and that it had shocked her somehow, but he frowns and tucks that aside for a moment in the presence of dud grenades. Those make him look slightly alarmed, although they do serve to explain the weird weight distribution in the box.

On one hand, they might still be dangerous, but on the other, they hadn't exploded coming through the Ingress -- they probably won't explode sitting quietly in a room.

"What's wrong with the hat?"