Oppo- had this thought today when flushing my heater core and it worked! It's so nice to have heat in Pittsburgh now, last week was fucking terrible when it was -7 (luckily my commute is like 12 minutes, so dressing warmly worked). However, I was also met with my fear when working on cars, so i was wondering what other opponauts have as a fear.
Personally, the mechanical fan is my number 1 fear. For some reason, anytime I'm near it i feel like it'll randomly start and catch a hand, or when its running and I'm looking under the hood, that it will disconnect and hit me (final fantasy style). No clue why, but that is the one thing that gets to me. Having the car in the air and being under it is fine, but start that thing and my fear level goes through the roof.