Okay, all the ants in a 50 ft radius appear 60 ft above your head and start falling.
The Monkey's Paw
Want to make a wish? Just ask the Monkey's Paw! No strings attached*.
(*) Satisfaction not guaranteed. Wish may backfire unexpectedly.
Just create a post that starts with "I wish ___" and wait for other users to write how your wish didn't turn out how you expected.
If you're feeling inspired, you may even use the wish as a sort of writing prompt.
Example:
Title: I wish for more wishes.
Answer: Granted. A piece of paper the size of a business card appears in your hand with 4 dotted lines for you to fill out your wishes and a little checkbox in front of each. Now to find someone who will grant those...
Lol, I wanted a power like that affecting all insects for years. I hate insects.
I'd be careful with this one. Like the others have said the ants would for sure appear 60ft above your head. Instead of raining down on you though, they would teleport back once they fall 10 feet. They would keep falling 10 feet over and over again, gaining speed each time, until they eventually reach the speed of light and travel through time to all bite you at once right before you buy that damned monkeys paw in the first place...
This will create a paradox because the ants couldn't have traveled through time in the first place if you don't buy the monkey's paw though, and this paradox will create a singularity in space time which will slowly consume the entire universe
All because you think bugs are icky
Congratulations, you teleported ants into your grandmother's skull.
Ok, ants now in pants
They're now right above your heads.