Even if you are a competent artist, an incorrectly drawn attitude may distract significantly from your painting and the message you are attempting to express to the audience. For example, in the two punch illustrations above, the first seems to be a person extending their arm out while the second appears to be punching.
When you lift an arm, it is not the only portion of your body that moves, unlike dolls with detachable extremities. Your body's modifications do not match Figure A, do they? As seen in Figure B, your shoulder elevates as well, and many other portions of your body react to the movement. This is what it means to observe: to pay attention to the features and qualities of the body.
