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

Watch: 'Mainstream' trailer starring Andrew Garfield and Maya Hawke.

Andrew Garfield and Maya Hawke star opposite each other in Gia Coppola's new film, 'Mainstream', which also features Jason Schwartzman and Nat Wolff.

The official synopsis for the film: "A young woman (Maya Hawke) thinks she’s found a path to internet stardom when she starts making YouTube videos with a charismatic stranger (Andrew Garfield) – until the dark side of viral celebrity threatens to ruin them both."

Watch the trailer for 'Mainstream' below...