Bale reprised the role of Batman in the sequel The Dark Knight. He trained in the Keysi Fighting Method, and performed many of his own stunts. The Dark Knight was released in the US on 18 July 2008 and stormed through the box office, with a record-breaking $158.4 million in the US in its first weekend. It broke the $300 million barrier in 10 days, the $400 million mark in 18 days and the $500 million mark in 43 days, three new US box office records set by the film. The film went on to gross more than $1 billion at the box office worldwide, making it the fourth highest-grossing movie worldwide ever at that time, before adjusting for inflation. It also ranks as one of the most critically acclaimed superhero films ever made.
In July 2008, Bale flew into an angry rant on the set of Terminator Salvation, while filming in New Mexico. In February 2009, the audio recording of the incident was released. The tirade was directed at Shane Hurlbut, director of photography for the film. According to Bale, Hurlbut had, for the second time, ruined his concentration by walking onto the set during a scene. The recording is of Bale directing profanities at Hurlbut, threatening and belittling him, and finally threatening to quit the film if Hurlbut repeated the offense without being fired for it. It was reported that Warner film executives sent the tape to the insurer of the film in case Bale decided to quit the movie.
On 22 July 2008, Bale was arrested in London after being accused of assault by his mother, Jenny, and sister, Sharon, at The Dorchester hotel. After his mother and sister called the authorities, Bale was held for more than four hours. He was released on bail, pending further investigation. On 14 August 2008, police declared that they would take no further action against him. Bale denied that any assault had occurred, and charges were not laid for lack of evidence.