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

Watch: Mick Jagger and Taylor Swift perform 'Satisfaction' together live.

Mick Jagger joined Taylor Swift as a special-guest on the 1989 World Tour last night in Nashville, to perform a surprise duet of The Rolling Stones’ classic '(I Can't Get No) Satisfaction' together live.

Watch the performance below...