How did Rome blow out the penlight?

I've always wondered about something. Even when Rome's Revolution was in its original long form, I always had the "birthday" scene where Rei presents Rome with a small cake meant to commemorate her one month anniversary of being Cesdiud (cast out).

Rei and Rome were still learning about each other at this point so he was taking a gamble by reminding her but his gut told him she would take it in the right spirit. I knew I didn't want candles in space so Rei rigged up a penlight to simulate a candle.

                    

Here is the actual scene:

     Rei took a deep breath. “It’s…kind of a birthday cake. Well, not a birthday. Maybe more of an anniversary.”
     “I do not understand,” said Rome.
     “It was one month ago today, well, one of my months, that you were Cesdiud.”
     Rome frowned and stared at the cake.
     “Are you upset?” Rei asked.
     She looked up at him. Then she smiled again. “Oh no, you are exactly correct. On that day, I was liberated. That is the same as being reborn.”
     She cocked her head. “What is the purpose of the penlight?”
     “Oh, when I was growing up, we always put candles on the cake,” Rei said. “You’re supposed to make a wish and blow it out.”
     “How do I blow out a penlight?” she asked.
     “Pretend,” Rei replied. “Close your eyes, make your wish then blow.”
     Rome pulled her head back. She closed her eyes then opened them again, leaned forward and aimed a puff of air at the light. The penlight went out. Rome clapped her hands together. “How did you do that?”
     Rei just smiled and laughed quietly.

The purpose of this scene was so that Rome could utter an "epic" line - She said, “Do you mean other than losing instantaneous access to the sum total of all human knowledge?” I've always wondered how Rei got her to blow out the penlight. It's such a minor plot hole that I seriously doubt anyone has ever worried about it. But still... Rei never told me.

I know that Rei had the penlight custom made so he could have had any kind of special electronics integrated into it. I'm assuming that either a) Rei had MINIMCOM build in a "wind detector" so that it actually shut of when Rome blew at it or b) MINIMCOM just shut it off at the right moment.

Who knows? Maybe it was magic. Do you have any ideas?