Oh God, that pause is priceless. Knowing how long to just hold a joke is something comedians work on their entire lives, and most never really get it. It's something Pixar and Disney animators and directors are solid at, but even then don't get it quite right sometimes. This, is 100% on the nose perfect. The looks they both give. The pulsing tail, how it just hangs... and hangs... and then hangs just a little longer than you think is long enough. Smash to both in extreme awkwardness. So great. Real skill here.