Comment by vanderZwan

Yeah, one of the cool things about sign languages that most people don't realize is that it's spatial, and that allows it to be more "parallel" compared to vocal languages because its "information channels" (e.g. two hands, facial expressions and "whole body language") can be placed side by side inside that space.

Of course spoken language also has multiple channels (e.g. tone and sound) but they still lack the spatial aspect.

Apparently, people who pick up sign language later in life commonly typically make what is known as a "split verb error", where they structure their signs sequentially like vocal languages when they should do those things simultaneously.