SO you cite 21760??
ARTICLE 3. Overtaking and Passing [21750 - 21761]
( Article 3 enacted by Stats. 1959, Ch. 3. )
21760.
(a) This section shall be known and may be cited as the Three Feet for Safety Act.
(b) The driver of a motor vehicle overtaking and passing a bicycle that is proceeding in the same direction on a highway shall pass in compliance with the requirements of this article applicable to overtaking and passing a vehicle, and shall do so at a safe distance that does not interfere with the safe operation of the overtaken bicycle, having due regard for the size and speed of the motor vehicle and the bicycle, traffic conditions, weather, visibility, and the surface and width of the highway.
(c) A driver of a motor vehicle shall not overtake or pass a bicycle proceeding in the same direction on a highway at a distance of less than three feet between any part of the motor vehicle and any part of the bicycle or its operator.
(d) If the driver of a motor vehicle is unable to comply with subdivision (c), due to traffic or roadway conditions, the driver shall slow to a speed that is reasonable and prudent, and may pass only when doing so would not endanger the safety of the operator of the bicycle, taking into account the size and speed of the motor vehicle and bicycle, traffic conditions, weather, visibility, and surface and width of the highway.
(e) (1) A violation of subdivision (b), (c), or (d) is an infraction punishable by a fine of thirty-five dollars ($35).
(2) If a collision occurs between a motor vehicle and a bicycle causing bodily injury to the operator of the bicycle, and the driver of the motor vehicle is found to be in violation of subdivision (b), (c), or (d), a two-hundred-twenty-dollar ($220) fine shall be imposed on that driver.
(f) This section shall become operative on September 16, 2014.
Without seeing the whole scene played out I surmise the following: The "surfer" passed too close to the "biker" by the "biker's" opinion. The biker yelled out something.....the rest is the video. Sorry biker but unless the whole video is shown I'm not buying your feelings got hurt. Which it's even given in CA DMV that bicycles are to be as far right as possible in the lane they are operating in.
Bicycles In Travel Lanes
Bicyclists traveling slower than the flow of traffic must ride as close as practicable to the right curb or edge of the roadway except in the following situations:
- Passing a vehicle or another bicycle in the same direction.
- Preparing to make a left turn at an intersection, into a private road, or at a driveway.
- When necessary to avoid a hazard or road condition (i.e., pedestrians, animals, surface hazards).
- When a lane is too narrow for a bicycle and a vehicle to travel safely side-by- side within the lane.
- When approaching a right turn.
- If the roadway is a one-way road with two or more lanes. In this case, a bicyclist may ride near the left curb or edge of roadway as practicable. With any slow-moving vehicle or bicycle, drivers should follow at a safe distance and, when it is safe, the bicyclist should move to a position that allows vehicles to pass.
As far as Sharrows are concerned:
• Shared Roadway Bicycle Markings (Sharrows) — Alerts traffic that bicyclists are allowed to occupy this travel lane. When used appropriately, sharrows can also help bicyclists to maintain a safe lane position.
So as a "biker" you don't "own" the whole lane when it's marked as such. It's there for driver's to stay alert.