Pistol whipping is no joke. The 1100 block of 22nd is pretty much under 280.

Ofc. E. Teper says:

On November 14th at 9:30 pm, a 24 year old victim was robbed on the 1100 block of 22nd St. The victim was met by the responding officers at a hospital in another county, where he was being treated for his injuries. He told them that he had gotten off the train at the Caltrain Station in the area after realizing that he had missed his stop. He took out his cell phone and called a friend for a ride. As he was putting his phone back, he noticed a group of four subjects standing nearby. One of the suspects walked up to him and asked to borrow his phone. When the victim told the suspect that the battery was dead, the suspect pulled out a handgun and ordered the victim to give up his belongings. The other subjects joined the suspect with the gun and surrounded the victim. The armed suspect struck the victim on the head with the gun and when the victim fell, all of the suspects began to go through his pockets, taking all of his belongings. The suspects then fled on foot. The victim managed to get a passerby to drive him home after which a family member brought him to the hospital. The robbery was reported to police four hours after the crime took place. This incident is under investigation. (SFPD Case No. 120924601)