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

Florence + The Machine announces new song 'Heaven Is Here'.

Following her triumphant return with 'King' last month, Florence + The Machine has announced she is releasing a second new song tomorrow, 'Heaven Is Here', which she describes as a "clamour of joy, fury and grief".