Hey fellow Netriders, On Saturday i had an interesting "moment" out on the Dandenong-Hastings Rd. After speaking about it with a few other people, some riders, some car drivers and some truckies, I've realised i may have been the contributing factor.... but i'll let you all have a read and be the judge. Cruising along at 100-110km/h on the R1 with the missus on the back. We were the only vehicle on the road heading north, and the only other vehicle was a massive truck heading south about 1km away. The road is duel lanes each way with a nice thick median strip (grass & trees) between us. I notice the truck slowing and indicating he wants to go onto the median strip, then i realise he's going to do a u-turn accross the median strip... ok. He pulls up, and has a look in our direction (about 300-400m away heading towards him @ 100-110km/h), and i see his face looking straight at us. The truck remains stationary. ... now this is where i may have instigated what follows... i hit the PASS button, signalling my high beams twice, with the intend he sees me incase he missed us at first glance. I also cover the brakes and start slowing by rolling off the throttle. at this stage we're doing around 100km/h and about 150m(ish) out when HE PULLS OUT AND BEGINS HIS U-TURN! So, keeping in mind my lovely lady on the back, i get on the brakes as hard as i can without sending her over the top of me, and get ready to avoid the truck, that was taking up both lanes as it was mid-u-turn. Factor in the reaction time and the speed i was going, i believe i was under 100m from the truck when the brakes were applied with force. More brakes on my behalf, and the truck completing the turn free'd up a lane which i took to miss hitting him, and no one was hurt. A quick "friendly" signal with the horn followed by my left hand, and we were all on our way. So, i ask you all, in you opinion, do you feel my high beam flash was the cause of this? As in, signalling the truckie it's safe to pull out? A few people have told me this! The point of all this, i guess, is to maybe get an understanding of how people interprut high beam flashes, and maybe avoid getting into a situation like this, where a missunderstanding may have been the cause.