Are you ready for the worst movie to have a part two? Well SyFy is getting set to release Sharknado 2, and they are celebrating this launch by pranking Londoners.

Here's how they did it: Special effects producers spent two weeks creating a lifelike shark. It was placed on fish counters at several stores. Customers screamed and shouted as the shark thrashed and snapped its jaws.

Don't worry, paramedics were close by to deal with any medical issues. Sharknado 2 airs tonight on the SyFy channel.