perell is glad he records the video of the women fighting.e says it proves that dangerous events, like what happened to him three weeks earlier, can happen on the bus, which san franciscans also refer to as the muni. >> thanks to the fact i had done a video and was getting phone calls from the media about it and it was on tv and all over the place, suddenly muni had to deal with it. there were a number of other incidents that happened on muni buses. so it was kind of this perfect storm of a lot of violent events occurring on a muni bus and one that had a really good video to go along with it. >> a spokesperson for the san francisco municipal transportation agency says that with some 700,000 passengers a day, it's hard to ensure everyone will get along. >> it's just a difficult situation for everybody. it's unfortunate that the passengers had to go through that. unfortunate our operators had to go through that. what we can do is try to make sure this doesn't happen all the time. >> rose says the agency has several measures in place to protect