Zelyonka attack
A zelyonka attack is a form of protest, provocation or violent assault, defined as throwing a solution of brilliant green (Russian: зелёнка, zelyonka, Ukrainian: зеленка, zelenka), a triarylmethane antiseptic dye, on the body (usually face) of a victim. On top of potential danger of vision loss, it is very hard to remove quickly; the complete natural removal may take up to a week.