Behind you prank
The two youtubers from the channel The Royal Stamped are very well know for this kind of prank I used to call "Behind you prank". They fake they're telling something gross to someone and finally they're speaking to someone else behind them. They like to use a lot of accessories and most of the time this is hilarious but the problem is they used to make only one or two type of joke during the whole video. In this video they finally managed to get another ideas and it's cool cause you can see lot of different situations very fun !