Edited, also if Chiyo is distracted by Mari....then surprise attack has greater chance to succeed with the 'clone swarm' tactics. As Chiyo was fooled by bunshin (and thus think one shinobi only used replacement technique), then top of that not expect Tanigakure shinobi knowing how use kage bunshin should throw her off guard.<br/><br/>But then how Mari got to puppet master just single leap?