The best Tonight Show with Jimmy Fallon bits are the ones that most resemble a slumber party moment or drinking game gone slightly askew … in front of a national audience. It’s therefore always the most quirky, lovable, or committed guests that make for the best bits, and that’s why this game of “Mad Lib Theater†with Benedict Cumberbatch is a true treat. On the show to promote nothing (just kidding, haha! Doctor Strange! Got you!), Cumberbatch proves to be his Cumberbatch-iest while giving Fallon ammunition for the mad lib — in other words, while he very quickly, and precisely thinks of quite complex answers to simple, fill-in-the-blank questions. A unit of measurement? Half a millimeter, of course. An action word ending in -ing? Well, gyrating, naturally. As Fallon himself says, “You’re an interesting gentleman.†And as Cumberbatch’s grizzled detective might reply, “No one can steal 4,229 eggs.â€