During my commute hom in the right hand lane of Eastlink outbound, following a (nearly) safe distance from the car in front, below the speed limit because that's the speed the freeway was moving. This guy behind me starts cracking the shits, right up in my bumper, swerving left and right, backing off then accelerating right up. I made the palm up "what?" gesture - I certainly couldn't go any faster! Whatever, I'll move over and let him move one whole car up - head check to my left, a motorcyclist beside me looks right at me and points behind him with his thumb - like a thumbs up sign but pointed backwards. At first I thought he might be complaining about the dick behind me, but his face looked really serious - on the precaution that maybe they're trying to warn me about something wrong with my bike or my venture rack or whatever I jump in the emergency lane and start slowing down - the car (now beside me) is slowing down too with the driver looking right at me. I stop, the car and bike keep going so I check my bag and bike - all ok. What the hell was the biker trying to say?!