Getting a little angry while in London, Shia LaBeouf allegedly head-butted a man during an argument at a local bar on Thursday (January 16).

The "Nymphomaniac" star has been involved in fights of this kind before, and a video of the incident shows him hit the man with his own head, as a woman in the background pleads for him to relax.

Although it remains unclear what sparked the altercation, the video footage records the 27-year-old saying to the man, "What did you just say?" several times over.

Watch the video of Shia Labeouf's latest bar brawl below, and send us your thoughts and comments on our Facebook and Twitter pages!