Man, I keep having that problem, that some car or motorcycle sounds like it needs a repair to me, only for me to realize that, no-no, they want it to sound like that.
Just yesterday evening, I heard someone revving before accelerating again after a stop at a crossing, and if they would've gotten out of their car at that point, I might've shouted over that, damn, sounds like they need to get their clutch looked at.
Genuinely thought they failed to engage a gear multiple times. Meanwhile, they would've probably punched my face in, if I insulted their car like that. ๐