Over the weekend, a golfer's routine swing in the rough at the Shady Canyon Golf Course in Irvine, Calif., struck a rock. Not so different from the way you play, right? Only this time, the impact caused a spark, and the spark set off a blaze that eventually covered 25 acres, according to Steven Buck, General Manager of Shady Canyon Golf Course, and required the efforts of 150 Orange County firefighters, writes the Associated Press.

The golfer's name is being withheld, which is probably for the best, and no charges are going to be filed. Fortunately, it all could have been much worse. As it was, the blaze required both helicopters and on-the-ground crews.

The conditions were ripe for a blaze, with dry brush from a recent heat wave just waiting for the right spark. Like, say, one caused by metal on rock.