While we were getting hyped about all the big news from San Diego Comic-Con last weekend, we were overlooking an even bigger event that was taking place across Instagram and Twitter between the cast of Marvel's biggest TV shows.
It's no secret that Agent Carter star Hayley Atwell is a big fan of Dubsmash, a weird app that lets you lip synch to random soundbytes and post them online. But when the Agents Of S.H.I.E.L.D cast got wind of this, things escalated quickly...
It started with Hayley Atwell and James D'Arcy getting silly upon arriving at Comic-Con.
But Chloe Bennet and Clark Gregg of Agents Of S.H.I.E.L.D weren't about to be outdone.
And team Carter accepted the challenge.
The Dubsmash war raged on into the next day.
But neither side showed any signs of surrendering.
Until the S.H.I.E.L.D team called in the Cavalry (and the rest of the cast, too) for an epic smackdown.
Hayley didn't take Clark dressed as Peggy very well...
...But attempts at negotiation quickly broke down.
There was a brief truce after Comic-Con; but Hayley and James struck back by pulling in the ULTIMATE ally - Captain America himself.
As if that wasn't enough, they put the final nail in the coffin with THIS:
Your move, S.H.I.E.L.D. Let's see what you've got to top that...