Spiders crawling in the phone.
Touch anywhere on the screen and spiders start crawling on the phone. The move around and cause allergy to people who hate spider. Great prank for people who hate spiders.
Spider crawls when you touch the screen, you can't kill them, you can't get rid of them.
Spider Prank with multiple spiders crawling over the phone. Unique Prank and only of its type rather than traditional Prank Call, Prank Dial, Screen Crack kind of pranks.
Improved animation for spiders making them look more realistic.