brake check...the smart way, use both front and rear brakes and slow down as if you are on a race track, smooth and fast, and start releasing as the car gets close and keep an eye in case the driver is not going to stop in time...requires some skill to do this, but for us riders who i ride with works evertime, the driver backs off always, sometimes even twice as normal or switches lanes, the driver can't get mad either because you do it so sneaky.lol but remember some drivers ARE tailgaters, thats how they drive, for those dik heads, i usually look back after at them, just to body language, i know you're on my ***, and im not cool with that. these drivers usually change lanes and go on their way then.