"Diamond in the Grump" is the fourth episode of Aladdin played by Jon and Arin on Game Grumps.
Jon mentions how people go to his Facebook page to share insulting things that people say about him on 4chan. The specific post he mentions is one that compares Jon and Arin, claiming that Jon is an unemployed virgin while Arin has worked for Fox and appeared on The Tester (while Arin belittles both of those achievements as being insignificant).
Jon and Arin joke about the Genie putting Aladdin through a bizarre platforming gauntlet, and how it clashes with his character.
Some ways into the level, Jon discovers that Aladdin can run. He compares this to Arin discovering the "tongue-up" maneuver in Yoshi's Island.
Jon and Arin joke about life coaches who try to motivate people by getting them to walk on coals, even when anybody can do that.
Jon clarifies that they don't run the Game Grumps Subreddit, after some fans accused them of self-promoting it on the show. Jon and Arin also mention some things that fans have sent them, like keychains and manga.Arin mentions that he had planned to buy Judge Dredd outfits for himself and a group of friends, then go to conventions and "judge" people for their costumes.