the language of the vap industry is whats causing confusion. These removable battery 'ecigs' loaded with 18650 batteries are called 'mods'. No way this desk clerk had any hand in actually modifying the electronics inside. Most idiots who transition from smoking or just pick up vaping becuase 'chucking fat ----!" (exhaling large clouds) looks cooler, dont actually understand that they are holding hand grenades. From the busted up pieces, it looks like he had a cheap, 3-cell regulated mod, so even if the button was locked on, it shouldnt have blown. However, where most of these explosions fault from in regulated pieces are from not understand that the wrapper is more than just a pretty decoration. The entire bodies of the 18650 batteries are the negative posts, just the separate button on top is positive. These guys dont take care and keep using batteries with messed up wraps, which eventually cause a short and runaway failure.