Which is exactly what you'd see when the device is shut down or if it ran out of battery, neither of which are unexpected if you left the device for several weeks, the fact that we'd all love it if the battery didn't drain a couple percent per day in sleep notwithstanding.
Forget it, just attach the crash.log if it happens again and maybe there'll be something funny in it. But you need to learn to spend 10 seconds
to take out your ruler.