When you park alone and then come out and find someone parked beside you. And you will walk to the passenger side of the car first and squat to check for dings.
When your check your oil Friday night and it's at the perfect level. Autocross on Saturday aka drive the hell out of it. Check your oil Monday morning before your commute and you are in desperate need of oil. Like oil level is at the twist of the dipstick!... Should I be concerned?! I was in boost the majority of the day. Double runs and all freeway driving there and back.