"Yessir, this Jewish kid still spew this sick s**t though, watch me I got a sick flow," LaBeouf raps to his impromptu audience.
"I'm so underground the rap kids call me Tubman," the outspoken actor added, referencing Harriet Tubman.
LaBeouf even makes a slight dis at his blockbuster movie Transformers during the bizarre performance. "Nah, none of that. Transformers is the dummy rap and I'm so past that," he rapped. "I want some new sh**."
"Shia LaBeouf sustained minimal injuries late last night on the set of his current film, American Honey," his rep told ET. "As protocol, production sought out medical attention and Shia received stitches on his hand and for a laceration on his head. He is due back on set tomorrow."