The phrase "pulls fast on" can be replaced with a variety of synonyms depending on the context. If talking about acceleration, you may use "accelerates rapidly," "takes off quickly," or "surges forward." In terms of speed, synonyms include "moves swiftly," "travels rapidly," or "races ahead." "Zips along," "whizzes by," and "zooms past" are other possible alternatives. Other synonyms could include "sprints," "hurtles," or "charges" if referring to a sudden burst of movement. Regardless of the specific synonym used, they all convey a feeling of motion and speed, indicating a rapid acceleration or quick movement.