If you are feeling a bit down, these hysterical photobombs are sure to brighten up your day.

From celebrity photobombers to photobombing villain blogs, the random appearances of strangers continue to be seen. Photobombers are appearing everywhere, awkwardly gazing at strangers' poses with the most perplexing facial expressions.

Pop culture junkies have now dedicated sites to photobombs, altering the phenomenon in various ways. An example is rodent photobombing where squirrels are placed into historical situations. This form of user-generated content continues to thrive as the popularity of photobombing increases. Sites are also allowing regular web surfers to generate their own set of hysterical photobombs.

From stalker photobombing to portrait photobombing, the awkward person in the background just may be the key to one of your photos going viral across the Internet.