In a file system, if a program opens a file and does something and then crashes, the operating system closes the file for you. It's not still open an… - Joe Armstrong

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In a file system, if a program opens a file and does something and then crashes, the operating system closes the file for you. It's not still open and then you can use it again. So I thought to myself, well, a call is like a file. So, what happens if you do this hook, you crash the program. Somebody else will watch (the operating system) will watch) and it will close the call just like closing a file. That was the origin of this thing that's now I call Let It Crash.