Materials concerning the episode "Friday the 13th". “Grandma Gerald (sees black cats) Friday the 13th/Quotes Pages in category "Friday the 13th" This category contains only the following page. F Friday the 13th/Quotes Retrieved from "http://heyarnold.wikia.com/wiki/Category:Friday_the_13th?oldid=25084" Ad blocker interference detected! Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.