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

Joseph Gordon-Levitt & Daniel Radcliffe's 2013 Oscars song/dance.

Joseph Gordon-Levitt and Daniel Radcliffe joined 2013 Oscars host Seth MacFarlane on-stage at the awards show tonight, to perform a song and dance number together.

Check it out below...