Even though this is way too impossible, I have a hard time visualizing this; what could a person with 360 degree joints (all joints) do?

For one, lick their elbow

I don't think you can lick your elbow even if it rotates 360 degrees because your bone (not forearm.. I don't know the name) in your arm, will disallow that.

I was thinking that the elbow joint could swing all the way around b/c you can lick the inside of your elbow. Not that this is productive at all. I was just thinking hypothectically.

Well if you're joints had 360 degree turning capabilities, you'd have to have skin with high elasticity. This in turn would require high tensile muscle fibers in order to to exist under the conditions with such strain. Now that we've reconfigured your entire anatomy, and discussed that an actual change such as this would go beyond just bone structure, and would require high degrees of genetic modification and/or plastic surgery.

 

You'd be able to do almost nothing special except twist your arms around in grotesque manners and ultimately just turn off the girls that you almost had a chance with to the senior prom. Besides that you could go around scaring the shit out of priests by pretending you're possessed. The imagination's the limit kiddo.

The owl can rotate its head 360 degrees. This is accomplished with several with a stack of joints in the neck each rotating less than 360 degrees.

I believe you meant 180 degrees there.

I believe you meant 180 degrees there.

You are correct.

Create some crazy dance moves?

 

Why would I need to be able to rotate any joint all the way around and back to where the limb, or whatever, was originally? I'm not trying to be an ass, I just can't come up with a reason why.. unless of course we were a species that evolved and adapted to an environment similar to the inside of a suitcase.

Yeah, I really think that it's impossible to have 360 degree joint, the bone attach to the joint is in its way.