While Chief Justice John Roberts was swearing in President Obama at today's inauguration, New York Senator and inaugural MC Chuck Schumer mugged a bit for the cameras. According to a progression of photos captured by Reuters photographer Jim Bourg, you can see Schumer smiling behind Malia Obama, realize he'd been caught, and then try to hide behind Malia again.

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Anyway, it's already a (slightly forced) meme! For example:

While the Schumer photo isn't technically a photobomb — Schumer had every right to be in the photos, after being side-by-side with the president for much of the morning — the series above suggests that Schumer was very aware of what he was doing, which is meme-worthy enough.