A lot of this made my eyes roll; but there's a lot of footage I haven't seen before. I didn't realise what a violent riot is was; and I certainly didn't realis

A lot of this made my eyes roll; but there's a lot of footage I haven't seen before. I didn't realise what a violent riot is was; and I certainly didn't realise that many of the rioters seemed to be in some kind of ecstasy - beaming as they fought. Is that meth?