Well my 8x4x3 did pop, if the glass was not toughened it would of most likely cracked and then exploded with me right in front of the dam thing. So yes you can be injured.
[video=youtube_share;1tsy4csCiDI]http://youtu.be/1tsy4csCiDI[/video]'
Yes I was standing there holding it, never ever do that also lol. But yeah if it gave way anymore would of been dangerous and thats without the glass cracking so imagine that with glass chunks flying around. thick glass leaves nasty cuts also slices your flesh wide open.
theres a few videos on youtube where some of the bigger tanks do pretty much blow open also.