Apparently ACI had some bottles left over with the old wider thread system. They made an adapter so you could fit the new style regulators on these tanks and were sold company direct. One of these tanks found its way to a local proshop for an airfill. When filling the threads of the adapter stripped out causing the regulator to snap back striking the person filling in the chest throwing him back several feet also rocketing the tank across the room threw a display. Randy Bocelli (person filling) walked away intact minus a good thud-n-tumble. Luckily there were no customers in the showroom when the tank fired.
Keep in mind the tank itself did not explode the explosion happened when the threads in the reg adapter ripped out. Judging by this pic of the regulator it looks like the adapter is the silver zrez just below the red regulator body. It acts as a stepdown from the old wider thread system to the new narrower regulator thread system. These adapters would found on are some of the older ACI tanks.
If at all possible try to notify your local proshops and fields about this incident. They deal with several hundred tanks per month and can/should help get these tanks out of circulation before something like this happens with another full showroom/airfill line.
post from warpig. the second link has a larger vid n pics of the tank.
Paintball Store owner Randy Bocelli injured in tank explosion in shop.
Here is a link.
As soon as I have more information I'll post it.
Here is more from Ballerscafe web forum.
Everyone needs to read this and take the approprate action.
Much Luck & Support Randy