Time stop

A Time Stop was a simple trick created by the Time Lords. A Time Stop was able to stop objects in time, making them appear to have "frozen".

used her device to activate a Time Stop on all the planes around the entire Earth in order to gain UNIT and Clara Oswald's attention when the Twelfth Doctor went missing.

The Time Stop confused Clara at first, making her tell her students at Coal Hill School to turn on their phones and add the hashtag #ThePlanesHaveStopped to news websites and Twitter. Clara later convinced Missy to release the Time Stop, freeing the planes. (TV: The Magician's Apprentice)