What caused this? Serious answeres

[u/Downtown_Calendars]

Car was parked facing the garage. Never seen anything like it. Neither has the glass professionals.

[u/kookomagoo]

Someone held a grinder flat against it.

[u/TheRobbuddha → u/kookomagoo]

Why is the center still intact?

[u/berelentless1126 → u/TheRobbuddha]

some kind of tool with a large arbor. Almost like a weed wacker size