Someone 'poke' Mark Zuckerberg on Facebook, because he might be feeling down today.

If you havent (ironically) seen it on Facebook Trending, Mark Zuckerberg attended his congressoinal hearing today, amidst the fallout from the Cambridge Analytica revelations in the past few weeks.

As Twitter users watched it live, they didn't fail to notice Zuckerberg's resting...whatever you want to call it...face.

It wasn't until the questioning from two US Senate committees began, when the memes starting rolling in.

Take a look at our favourites below: