The Original Photobomb

Via

From the Seinfeld episode "The Slicer".

These Are Funny

Click 'em to enlarge
































































...and there are 18 more just like this here.

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Megapost: Photobombs Phriday

Click each image for the rest of the photobombs








Tons more:

Photobomb.net

This is Photobomb

And there's even a Facebook Photobomb Group.