Straight ahead is a term used in animation that refers to a method that uses only the first key pose of a character, and then continues drawing the character to create the desired motion.
It was first referred to in the 1981 book by Ollie Johnson and Frank Thomas The Illusion of Life, and is a part of the 12 Basic Principles of Animation.
[1] Disney director-animator Woolie Reitherman said, "When I didn't know what I was doing in an action, I always went straight-ahead.
"[2] Straight ahead animation is mostly used for wild, scrambling actions where spontaneity is important.
Although this technique is a lot more spontaneous and creative, it can create inaccurate results.