Breaking bad: HK students go from books to archery and Molotov cocktails Student protesters at Hong Kong's Polytechnic University practice using Molotov cocktails as well as bows and arrows, as worsening violence rocks the city. Universities have become the epicentre of battle, with students -- joined by other black-clad 'braves' of the frontline protest movement -- saying they have been pressed into the defence of their campuses by police threats.