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A man thought to have taken spice was seen howling in a city centre and writhing in pain, as unsurprised shoppers walk by.
The unidentified "spice zombie" is contorted around a pole as he starts a moaning.
The noise gradually increases in volume to a howl as his eyes bulge out and his mouth opens wide.
He starts doing a "backstroke" on the pavement, before picking himself up and running off screaming, barging into a woman before crashing heavily into a shop sign.