and then i could see the tail was in the air. i could see that the tail just completely came off. >> doctors spend their lives train to go respond to a tragedy like we witnessed yesterday. at san francisco general hospital, they were ready when the victims started to flood in. elizabeth cohen looks at the kind of injuries they had to treat. >> area hospitals are seeing a wide range of injuries, everything from the minor to the really severe. let's take a look at them about so they have been seeing cuts and bruises, broken bone, spinal fractures, burns and internal bleeding. in situations like this, there are certain kinds of injuries that doctors worry the most about. for example, head injuries. trauma to the brain can cause bleeding inside the skull. the brain doesn't have any room. that's immediately life threatening. another kindf injury and another one that you can't really see is internal bleeding