Oh, just “one of those nights,” Chris Rock captioned a photo of himself this morning on Instagram, singing alongside Prince and Jimmy Fallon at the SNL 40 after-party. The postshow reveling included many such moments: Prince led a chorus of “Ohs!” as Martin Short observed quietly in the corner. Taylor Swift and Paul McCartney shared the stage for “Shake It Off” and “When I Saw Her Standing There,” while Bill Murray entertained himself on the tambourine. Jimmy Fallon was everywhere, as usual. Below, we’ve collected last night’s best video and photo moments from the bowels of social media.