Just had a bloke come in and ask me to check out the exhaust on his Prius - it started making a noise when he came out of the supermarket. Apparently it was okay when he went in. I told him he'd probably hit a speed bump but he assured me he hadn't. When I looked underneath, someone had sawn it off and nicked his cat for scrap value. Just chopped the wiring going to the lambda too. Gonna cost him 1,500 plus to get it replaced. He was only in there less than 10 minutes. When I phoned up to get prices, I was told its a common thing to happen on those cars.