It was really easy to crash an Apple II game and get into the assembler. And my goodness am I glad I didn't destroy my computer as a kid randomly typing things in to see what would happen.
Remember old Apple, had to use them when learning to program, there were 2 types, one with the OS on a diskette, one with a small hard drive, and they randomly showed a large bomb in the middle of the screen and you had to reload the OS. Probably the compuler that broke everything.