Chuunin exams is just gonna be Rock Lee throwing a punch - cut to Gaara's face. Cut back to Rock Lee. Cut back to Gaara's face. Cut to slow motion CGI fist hitting Gaara's face. Cut back to the upper level where Naruto et al are watching. Cut to the two Hokages. Cut to Orochimaru's (shh) smirk. Cut to Temari and whats his face smirking. Cut back to Rock Lee's actor. Frame his face. Cut back to Gaara. He has the shittiest cgi particles of sand around him. Cut back to Rock Lee. Cut back to Gaara. Camera now is looking down at them from above, making it easier to hide the fact that the sand looks like shit. Naruto and Kakashi spend the entire episode narrating the shittier version of the fight. Rock Lee only enters the first gate because they didn't have the budget for a bunch of wire-fighting.