Complex sentence: Brad Pitt also has a half-second-long cameo, as a miffed star in the documentary on Malkovich's career, who seems to be on the verge of saying something before the shot ends.
Split into simpler sentences: Brad Pitt also has a half-second-long cameo, as a miffed star in the documentary on Malkovich's career. He seems to be on the verge of saying something before the shot ends.