Reaction Gifs

Because why not?
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From Know Your Meme:

Reaction Images are images or animated gifs that are meant to portray a specific emotion in response to something that has been said. They are commonly used in discussion threads in a similar fashion to emoticons. OriginReaction images have their roots in the pictorial representation of facial expressions known as “emoticons”, with the first recorded instance produced by Scott Fahlman on September 19th, 1982. The exact origin of reaction images is difficult to trace, but it early examples have appeared on Futaba Channel (2chan) and 4chan. One of the earliest known reaction faces is the facepalm, which was first recorded on Urban Dictionary on February 10th, 2004.