At auto repair center after I realized that a tube connected to the undercarriage of my car had come loose and was dragging on the ground:
Repair guy: Yeah, so we couldn't figure out what it was. So we cut it off for you.
Me: ... But you don't think it was important?
Him: Probably not. I wouldn't worry about it.
Me: So you have no idea what it is?
Him: Nah.
Me: ... But you're sure it's not dangerous to drive without it attached?
Him: Shouldn't be. **shrugs**
2020 as applied to car service. Also, my car is apparently from Ikea.
