Silence Marshmello feat. Khalid Download 'Silence' on iTunes
You can also listen to the clip of Rob, Wingman and Rachel doing it, and then follow the instructions to have a go yourself.
All you need is some luke warm water and turn your speaker up.
1) Dip your hand in the water
2) Close eyes
3) Press play on the Sneeze clip below
4) Flcik the water into their face