Someone Turned All 18 greens at University of Michigan’s Golf Course Orange.

Somebody decided to sabotage every green at the University of Michigan’s renowned golf course. Including the practice green.

Now, this being a big country and all, damaging one or two greens happens here and there. A disgruntled employee. An angry neighbor. Some idiot with a jug of weedkiller and too much time.

But all 18 greens—and the practice green?

That’s next level. Someone was either terribly bored or had one hell of an axe to grind.

According to The Wall Street Journal, video shows a person wearing a hat and hood filling containers used by the grounds crew with some kind of chemical. The culprit apparently knew what to target and made sure no green was left behind.

The result: Every putting surface turned orange.

This isn’t some neglected municipal course, either. The University of Michigan Golf Course was designed nearly a century ago by Alister MacKenzie, the legendary architect who also designed Augusta National.

The university has confirmed that vandalism occurred, but police haven’t identified the person responsible or disclosed what chemical was used. Turf experts were brought in to examine the damage—including experts from Michigan State University, which may be the first time the Spartans have been called to Ann Arbor to help keep Michigan green.

Strangely enough, golfers say the orange greens still play reasonably well. The grounds crew is letting the grass grow longer while it tries to recover.

It takes a particular kind of commitment to sabotage an entire golf course.

Imagine what this person might accomplish if all that determination were put to better use.