In May 2016 , four other members of Trollstation were jailed for between 16 and 20 weeks after staging a ' terrifying ' fake art heist which caused a stampede at the National Portrait Gallery . Five members of " Trollstation " - some with tights on their heads - burst into the central London art gallery playing a loud alarm and pretended to steal paintings , just a week after the 2015 Sousse attacks . The gallery 's visitors fled in apparent panic and one woman passed out , while others were trampled on in the rush before the group moved on to Tate Britain where they carried out a fake robbery and kidnapping , a court was told
2015 Sousse attacks
2015 Sousse attacks
Trollstation