I think pressure looks really good, but I have a hard time believing the videos I saw. I mean, There is only ONE way into a balloon, without destroying it. And I kinda get the first part of the trick, when you let the air out, I'm just hoping it doesn't end there. So my question is: After you have put the phone into the balloon, and handed it out for inspection, can you then blow up the balloon again, with the phone inside?