Bill Cosby rejoined Jimmy Fallon last night in late-night — Cosby frequented Fallon’s Late Night, and just as he did there, the Cos enjoyed taking his sweet time with Fallon making his way to the panel chair on The Tonight Show.

Perhaps he knew that Fallon would unleash his Cosby impersonation on him?

Then Fallon literally piggybacked on Cosby while asking Cos to “tightrope” across the studio floor.

And to think, Leno couldn’t make these variety games work at 10 o’clock just a few years ago.