I was going along Burwood Hwy tonight when I caught up to someone with an old cage in the right lane doing between 5 and 10 km/h under the limit. I changed to the left lane and was gradually going past without exceeding the speed limit. A bit further down the road the left lane had a parked car up ahead so I put on my right indicator and waited a couple of seconds before head checking. Well didn't that geezer suddenly find 10 km/h! I ended up finding 15 to ensure there would be no possible rider down or rear-ending of the parked car from me. Funnily enough, he dropped back to his slower speed after I was in front of him in the right lane. I don't get why people refuse to let you pass when they are quite clearly going at a slower pace.