Last night I was on Pennant Hills Rd, and an Audi TT cabrolet was cruising along with his petrol cap cover up on the right, rear quarter. [yeah, it's on TOP] Obviously not closed properly. Now I was filtering and doing whatever I've got to do to get through traffic [bikez r fun!] - so I filtered up to this guy, and closed his cover for him. [it was a really nice one too... made a sweet solid click and everything :grin ... & the car behind toots their horn twice at me Nothing else. Just 2 x horn. I finish closing the cap anyway, and filter up to the front. I don't think the Audi driver knew what I did. I just thought it weird, like someone thought I was vandalising someone else's car and decided that the best they can do is toot the horn But anyway, I'd close someone's petrol cap for them again. Anyone else done it? Got thanks? Got angst?