If you think 'Tonight Show' host Jimmy Fallon brings infectious energy to this show, it's high time you meet comedian Billy Eichner, who consistently infuses his Fuse show (see what we did there?) 'Billy on the Street' with a dizzy mania that both unnerves people and makes them smile. Obviously, when Eichner stops by 'The Tonight Show,' it's the perfect time for this madness to come to Fallon's audience.

Eichner's show is ostensibly a quiz show, but it's more about screaming, laughing, and the most inane questions imaginable than actually quizzing anyone. What happens when Eichner takes it to Fallon? Loud, loud magic.