He not revving the crap out of it when when reversing, it just sounds like it due to it being a manual and the muffler. If he revvs the crap out of it you know and it would be 20 times louder than what it is now. But slight inexperienced would be also a factor and he is getting better, he only had his license for 8 months, car been around longer as we got it for him when he was on his Ls (just a cheap car until he could save something better) I think old biddy moved on, just concern on the lady at number 20. She carried on but I bet she never seen him physically reversing the car back into the driveway so she just assumed he was sitting there revving it which he wasn't. I was inside the house and I could hear him clearly backing it up. Since then he no longer reversing it in the driveway in the afternoon as I think he nervous she come out and go off at him again. He back it out in the morning again but instead of going south which is way out, he going north and around the block as it easier to get out he said but means he drives pass their places so I sure they complain about that now!