I ran over my cell phone with a lawnmower.
No, I didn't plan to do it, but I had not taken sufficient care to keep it from falling.
I seem to recall someone saying, "Don't lay up for yourselves treasures on earth, where moth and rust corrupt, and where thieves break in and steal. But lay up for yourselves treasures in heaven, where neither moth nor rust corrupt, and where thieves do not break in and steal. For where your treasure is, there will your heart be also."