This is what a normal tank burst looks like with a hydrostatic burst, rather than a pneumatic burst. Well, blow me down! In other words t' tank is completely filled with an incompressible fluid, shiver me timbers, aka water, me bucko, and when t' tank fails thar isn't very much stored energy. Aye aye! T' tank itself is a test o' a different fabrication process for COTS tubing.