The last time, about 10 days ago, when I drove my car really hard after the timing chain recall was done, I pulled into a friend's driveway, and it did the "Tick..tick..tick!" for a while, popped a couple of times, and the usual scorched smell. My friend and his wife both asked, "What's wrong with your car?". I told them almost every car I've owned going back 40 years did it, and "it's normal". They denied it. 15 minutes in one of their cars ('13 Jeep Grand Cherokee), showed them I was right. Apparently, they just never got on it hard enough to really get it hot and stinky.