It was Kawarimi not Kage buushin.Originally posted by: raijin
EDIT: Orochimaru has used Kage Bunshin before, in the Forest of Death against Anko. Also, the reason why Kage Bunshin is not used frequently, is that it evenly divides the user's chakra among the clones. The more clones, the more the chakra is divided and theoretically the weaker the user becomes since chakra is derived from stamina. Naruto has an abnormal amount of stamina as well as the Kyuubi's chakra; this is why he can use Kage Bunshin frequently.
"Kawarimi yo. " - Orochimaru ep 30 14:01 ANBU v.