Helped a friend lay out for propane tank, trench, through foundation for furnace/ water heater. Furnace guys did install and leak test twice after failed flex connection.
Inspector looked past a couple things and passed it.
I never checked to see if they grounded it to the panel.
Did my own myself with black pipe and the inspector even double checked the ground wire gauge and clamp before signing off.

An auto insurance mention, A rock from semi busted my windshield, inquired about coverage but had it replaced on my own. Later when paying insurance online I noticed a recent claim on my account. Yep, claim was for my windshield that I paid for on my own. Took me 4 hours over 3 months to get that removed and rate increase off. Gotta watch those guys!