There are two main approaches to hand drawn animation. The first is
known as straight ahead action because the animator literally works straight
ahead from his first drawing in the scene. He knows where the scene fits in
the story and the business it has to include. He does one drawing after
another, getting new ideas as he goes along, until he reaches the end of the
scene. Thig process usually produces drawings and action that have a fresh
and slightly zany look, because the whole process was kept very creative.
Straight ahead action is used for wild, scrambling actions where spontaneity
is important.