coup de main - noun
kü-də-ˈmaⁿ
Definition of coup de main : an attack that achieves complete surprise.

Watch Harry Styles prank (poor) Mabel.

Last night, Harry Styles' European arena tour finished up in Dublin, and to celebrate the end of the leg he played a prank on opening-act Mabel by throwing a 'vegan' cream pie in her face and covering her in silly string.

Watch the prank unfold below...