The 20 most awkward high-fives in the history of human hands.

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He should have high-fived Ryan Seacrest's face with his cane.

High-fives aren't easy. You've got to initiate and risk rejection and then non-verbally coordinate so your hands slap one another in mid-air—it's a nightmare! Not even the geniuses at NASA can get it right. Still, it's pretty effing hilarious when they get awkwardly screwed up like they do in the 20 gems below. Share these with your uncoordinated friends on Facebook or Twitter to let them know they need to practice their celebrations.

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Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.

Image may be NSFW.
Clik here to view.