Complex sentence: Realizing that his conversation with his wife was being observed by his enemies led him to rush out of the interrogation room in a rage to find Vic and Lem tiptoing out of the observation room.
Split into simpler sentences: Realizing that his conversation with his wife was being observed by his enemies led him to rush out of the interrogation room in a rage. He found Vic and Lem tiptoing out of the observation room.