I think some on here are making assumptions-- I walked out of the car planning to change a tire, that's when I first noticed the car sitting on the suspension. Never had that happen before, and don't know what type of damage it can cause. So I don't think I was out of line to be upset/angry, it was an initial reaction, but indeed hindsight being 20/20 I should have reacted this way:
I will tell you what works for me if faced with a similar situation. I first focus on task at hand and not the past state that caused it. Resolve the immediate problem, and plan later for evaluation cause and effect. Deflection of tempers is also healthier, and allows you to think clearly before, during, and after the situation at hand.
One of those easier said than done things, and I'll work to approach it differently next time.
But the whole fist fight thing-- I'm not an aggressive person at all, not a fighter. I call it short man syndrome when that's the first person's reaction to a conflict, which was my FIL. I've encountered a lot of those types of people in my life-- and I've seen a strong correlation between height and desire to fight for some reason. If that's his reaction to me loudly saying "this is why I asked you guys to wait 5 minutes", that's on him. Fist fights are not how I handle my problems. I just shut my mouth and didn't say anything for 5 minutes until the situation diffused itself and everyone involved could collect their thoughts. He spent a couple minutes berating me about how I think I'm god and the only one that can change a tire, I just let him vent. I absoultely trust him to change a tire, it was about the 5 minutes and having proper tools.
All is well now, he's going to bring his late 60's Chevy truck over this week so we can do an engine swap. A little bonding instead of fighting would probably do us both good after this event!