I am also going to miss the grunt banter. I want to say that they got into a fight and someone used the matagun, but being as it's shackled together with parts Datu could find and it's High Pressure Air, a seal broken and turned into either a projectile or bomb. I hope this isn't true because then Datu would be mega ultra super depressed on top of everything, I just don't figure Datu would find enough reliable seals and piping for the kind of pressures the Mata Gun would need to do the damage it's described as doing.