With the brouhaha over Tonight Show succession still brewing, Jay Leno and Jimmy Fallon got together last night — in that little no-man’s-land transition area between their respective shows — to squash it musically. Jacking the beat from Bernstein and Sondheim’s aptly classic West Side Story joint “Tonight,” the two weave a tale of mutual non-competitiveness and everlasting friendship that’s some parts “kiiiinda funny” and some parts “just kind of a thing that happened that you’ll remember in a few years and be like, ‘Oh yeah, that was weird.'” And somewhere, a giant redhead is rolling his eyes.