When russian savage brutes invaded Europe in 1945, desperate Germans invented a new way to stop (unfortunately, only temporary) murderous subhuman horde.
Knowing congenital russian obsession with booze and their unstoppable urge to drink everything that has a slightest resemblance with alcohol by either smell or vision (from insecticides to machinery liquids), Germans left stocks of methanol on red horde’s way. Plenty of red rapists and looters found their painful, slow death nearby.
Modern days revealed one more cheap and fast way to disable red drunk subhuman. Vodka and brick left on his way.
(an advice: disable sound, there is nothing but russian dirty profanities).
Considering russian ape herd instinct, a pile of bricks and barrel of cheap vodka should stop them as effectively as tank full of booze-smelling chemicals.