This can happen as your Volcano vaporizer uses a pump to fill the bag. This is good in that it can fill a bag that has resistance from the herb being packed too tight. But the problem of the bag popping can happen if you walk away from your vaporizer and do not turn it off. The Super Surfer, on the other hand, uses a fan to fill the bag more quietly than the Volcano. With the fan having less force than a pump your bag will not pop when filled all the way. The Super Surfer actually will stop vaporizing as the air will be blocked from the pressure of the bag is full.