Since San Fernando, like Fontana and San Gabriel, had a drainage canal alongside the track, occasioanlly a racer would lose it and go under the fence and wind up in the canal. I read a story where Frank Pedregon went down into the canal at San Fernando, climbed out and "played dead" while the ambulance crews struggled to get to him. As they approached he jumped up and let everyone know he was okay. Here's a photo of a racer that had gone into the canal at San Fernando:
