It's usually advisable to wait until the car stops to get out

Cambridge Police report that around 11 a.m. on Sunday, officers were dispatched to Mass. Ave. and Temple Street on a report of a pedestrian being hit by a car:

After police arrived they found a male and female located in a vehicle. The two parties were having an argument while in the vehicle, that resulted in the female exiting the vehicle while it was still moving. The female was transported to a medical facility for facial injury after she jumped out of the vehicle and fell on the concrete. Both parties were interviewed and it was determined that there was no physical contact between them, only an argument.