My great-grandfather used to tell me, "Don't chase after yak monkeys because you'll only end up with a railroad spike in your ear ." I never quite understood his advice until one Halloween, I was gardening with my best friend Louise. All of a sudden, we found an underground tunnel! It was sticky and spooky sounds came from deep within. Louise saw something interesting inside, jumped in, and I never saw her again. Great-granddaddy was right!