The argument reached a climax when Reinhardt allegedly threw her cellphone through the car window.The 28-year-old star had huge brawl with Reinhardt after the baseball player tossed his girlfriend's cellphone out of their limousine, reported New York Post.
The couple was enjoying an evening out in Hollywood on Saturday, attending the annual costume party thrown by supermodel Heidi Klum and her husband Seal.
But after they left the fancy dress event, the pair allegedly became embroiled in a furious row as they got into their car.
"She was mad. She jumped in the front seat and (Doug) was holding her around the neck saying, 'Relax, relax'," said witness , a lensman.
The argument then reached a climax when Reinhardt allegedly threw Hilton's cellphone through the car window, forcing her to stop the vehicle and search for the device.
"She was staggering down the street, up and down. And the guy they were with was trying to block anyone from taking pictures," said a second witness.
After a paparazzo found the phone and returned it, Hilton climbed back into the limo and began ranting at Reinhardt for throwing it out the window. She also reportedly started slapping and kicking as he grabbed her and tried to fend her off. His left hand had a firm grip on her throat, according to the witness.
