Mismatched characters can create this effect. Picture a tough biker dude being scared of a cute little bunny that has red glowing eyes. The contrast between their expected roles is funny and creepy. Dark humor is also a key. Saying something like 'The zombie's bad breath was the real killer' in a story about a zombie apocalypse can add that funny - creepy feel. And then there's the use of suspenseful music or sounds that end up being for something really silly, like the sound of a creaking door leading to a room full of balloons.
Unexpected twists can do that. For example, if a character is being chased by a spooky monster and then it turns out the monster is just a friendly dog in a costume. Another element is over - the - top reactions. If a person screams at the sight of a small spider that has a really goofy face painted on it, it can be both funny and creepy. Also, using familiar settings in a strange way, like a normal classroom where all the desks start floating and the teacher just shrugs and says it's normal today.
One element is the use of innocent - looking things with a sinister side. For instance, a beautiful flower that whispers creepy things when you get close. Also, misunderstandings can be great. If a person thinks they see a ghost but it's actually a bedsheet on a clothesline blowing in the wind and their over - the - top reaction to it is really funny. And having a character who is constantly in denial about the creepy things happening around them, like when they see a vampire but keep insisting it's just a person with a really bad sunburn, can add both humor and creepiness to the story.
Character traits are important. A really superstitious character can make a story both creepy and funny. They might see signs of a 'curse' everywhere, like when the lights flicker and they think it's a ghost, but it's just an old electrical system. Their over - the - top superstitions create the creepy atmosphere at first, but then as the real reasons are revealed, it becomes funny. Also, when characters are in a situation where they are trying to be brave in the face of something they think is scary but are actually really clumsy or make stupid mistakes, it adds to the both the creepiness and the humor.
Surprise can be a key element. For example, if you expect a scary monster but it turns out to be something harmless and silly like a bunny with big teeth painted on it. Another element is the contrast between the situation and the reaction. If someone is in a supposedly haunted place but they respond in a really nonchalant and comical way, like singing a happy song while walking through a 'haunted' corridor. It creates a sense of both creepiness and humor.
Surprise elements can do that. For example, if a character is expecting one thing and then something completely unexpected and a bit spooky happens. Like in a story where a person is waiting for their friend at a café, and instead of their friend, a small, pale child with no expression appears and starts whispering strange things, that's unexpected and creepy but also has a funny - in a dark way - aspect to it.
The combination of spooky settings and silly explanations. Like a spooky old house where the 'haunting' is just the old floorboards creaking because of a mouse. The contrast between the seemingly scary situation and the mundane cause is what makes it both creepy and funny.
Mixing the ordinary with the spooky. Like a mouse making noises in an old, supposedly haunted building. You expect a ghost but it's just a little mouse. This contrast creates that creepy funny feel.
Surprise is a key element. For example, when you expect a real ghost but it turns out to be something silly like a prank. It creates that funny - creepy feeling.
One element is unexpected behavior. For example, if a timid character suddenly becomes super brave and does something wild in a comical way. Like a shy librarian who stands up to a group of rowdy patrons by using really big words in a sarcastic tone. It's funny because it's out of character and badass because they're standing up for themselves.
Surprise elements often do. For example, when a normal situation suddenly takes a completely unexpected turn. Like a librarian who starts break - dancing in the middle of the library. It's so out of place that it's both weird and funny.
Exaggeration also plays a role. If a character is overly paranoid about every little sound in an old mansion thinking it's a ghost, and then the 'ghost' turns out to be a mouse that makes really loud noises. The extreme overreaction of the character to a normal situation is both scary in the moment and funny when the truth is known.
Surprise elements can make a story both funny and disturbing. For example, if in a story, a character who seems very proper suddenly starts doing something completely out of character like dancing on the street in a crazy way while wearing a ridiculous costume. It's funny because it's unexpected, but it can also be a bit disturbing as it breaks the normal perception of that character.