A little over two weeks ago, Russian feminist protest group Pussy Riot was arrested for crashing the field at the World Cup final wearing police uniforms. They were protesting illegal arrests. After serving 15 days in jail for their "crime," they were released, but then, to their surprise, were immediately arrested again. Looking at this video, it's obvious they weren't expecting this.
Their crime this time? According to The Guardian:
A tweet on Pussy Riot's official Twitter page said they had been charged with "the organisation and holding of public events without prior notice" and could face another 10 days behind bars.
our 4 activists (nika nikulshina, olya pahtusova, olya kuracheva, petya verzilov) are arrested again and brought to the police station; they're charged with article "20.2.2" - "the organization and holding of public events without prior written notice’ - up to 10 days of arrest.
— 𝖕𝖚𝖘𝖘𝖞 𝖗𝖎𝖔𝖙 (@pussyrrriot) July 30, 2018
Here they are at the world cup: https://youtu.be/FWg7cKeJHUc