Not scary (for you at least), just a childhood memory.

My mother has a dry, blunt sense of humor. ("What's for dinner?" "Food.") So she's probably the last person you'd suspect of pulling any kind of prank, especially on Halloween. You see, the "trick" part of "trick or treat" isn't very big here, (TPing, egging houses, etc.), or at least in my neighborhood. In fact, it doesn't happen at all.

Anyway, on Halloween night when I was younger, (I don't remember how old I was), after the traditional pillaging and dividing of the spoils, it was time for bed, and being the older brother, I took my rights and took dibs on the top bunk, (this was back when my brother and I slept in the same room with a bunkbed.) Just as I was crawling into bed, I looked back out the window, and like Charile Brown, the "Great Pumpkin" rose out of patch, and scared the crap outta me, followed by my mom's face.

"Gottcha!"

Proves you just can't trust anybody, even your own mother.