Watch Emma’s expression at the beginning of this gif, though:
Emma is worried about Killian.
She’s worried about what happened to him, what sort of ‘long story’ he may have to tell. But it’s not because she thinks he did anything wrong, but because he seems genuinely hurt, genuinely bothered by something.
And she’s worried.
In which Emma making Killian’s hook disappear becomes a habit.
The second time she did it was shortly after they defeated Zelena.
Emma and Killian were sitting at a booth in the diner with Henry, sharing cocoa and eating fries.
"Want to see something impressive, Henry?"
Emma waved her hand and suddenly Killian’s hook disappeared from his brace and reappeared hanging from a light fixture.
"Cool!" said Henry with glee.