Nick Fury is head agent of S.H.I.E.L.D. The top badass spy who secrets have secrets that have secrets. So one day when he smiles so you can't blame the Avengers reactions.
Third Person.
The Avengers mission had been completed successfully defeating Loki and his army. Back at S.H.I.E.L.D headquarters he debriefs the team, congratulates them. But then he does something he's never done. Smile.
Master assassin Black Widow knocks him to the ground with a gun pressed against his head. "Who are you? And what have you done with Nick Fury?" She says. The rest of the team either beside themselves with laughter or pointing their weapons at him looking like idiots. Fury looks up and laughs no humor in it, "How bout' I tell you something only I would know. Hmm?"
Everyone looks around then Tony shakes his head "Okay try your best." Fury smirks, "Natasha how about Paraguay 1999. Tony, Rio 1996. Barton the 'training accident' in 2002. Now would anyone like fore me to elaborate?" He looks around as the weapons lower, "I'll take that as a no." He says walking out of the room Avengers standing there, mouths gaping in at his knowledge.
When Clint leans over too Natasha, "So what happened in Paraguay?" She shakes her head, "It involved water guns and a white t shirt."
A/N
Hop you liked it! Me and my friend came up with this during Reading Class. So special thanks to Emmy! :) Please review and give me ideas for my next fanfic!