Is there a limit to how much NBCU promotion The Tonight Show Starring Jimmy Fallon fans will swallow? Fallon’s been doing his show this week from Universal Orlando Resort — already he’s made roller-coaster-phobic Kevin Hart ride one at the resort in exchange for plugging Hart’s new movie, Think Like A Man Too. Last night Fallon plucked a “viewer” note from his Suggestion Box: “I Love the Harry Potter theme, but I also love rap. Is there any way you can combine the two?” The Universal resort’s new Harry Potter/Diagon Alley reportedly cost an estimated $256 million. Fallon’s in-house band, The Roots, got to work. Sigh. Watch here: