Insight owners will know what I'm talking about.
On the hatchback door, the spoiler covers the area where the two sheets of glass meet (long sloping one & short vertical one). The third tail light in in the assembly.
Anyway, this morning I backed out of the garage just before the door had cleared, busting the spoiler off the Insight.
Only good thing is it was a clean break that did not damage anything else. As Insight owners might suspect, it's plastic with five bolts. It will be replaced Wed - $153 parts - $99 labor.