We picked up a new 3001W on Friday June 29. So of coarse we headed out to a campground that afternoon to move in and give it a shake down. On the fifth afternoon (4th of July) three others and I were eating at the dinette and we all heard a popping noise, sounded like a kids balloon popped inside the camper. Dogs laying under the awning on the outside made no sound or movement, and they bark at all fireworks. This is our third camper and we have had a pop-up and tent camped in the past and have never heard this noise before. Anyone have any idea what could have made that noise?