The ghosts can scare you even when you're "safe" while studying the map in the menu screen. Sometimes when you exit the menu you'll see a little girl ghost with a hat. She looks at you for a split second and then swiftly floats downward. That means she was just waiting for you to stop looking at the menu.
The game has a "quick turn" feature that can save time but sometimes gets you spooked or killed. Rarely after using it there's a chance you'll see a ghost all covered with hair that quickly vanishes. The only feature visible is a gaping, black mouth. The ghost was silently following you all along. It's possible normal turns aren't quick enough to glimpse it, but if you overuse quick turns the game essentially punishes you for it. A Japanese YouTuber named CO-DA who would frequently use the quick turn for fun saw this ghost and was terrified.
who would frequently use the quick turn for fun saw this ghost and was terrified.