Bullock says that his students call him "Professor X". Patrick Stewart, who voices Bullock, played Professor X in several of the X-Men movies.
During Klaus' music video, his appearance changes to resemble several rappers, including Eazy-E, Vanilla Ice, Shock G from Digital Underground, Insane Clown Posse, Coolio and Tekashi 6ix9ine.
Roger's disguise is a nod to Mike Myers' SNL character Linda Richman.
The title is a reference to The Neverending Story