[He nods as she goes; he doesn't even need to hum the music this time for her to perform it successfully.]

For the dip, you'll want to do it like this...

[He demonstrates, though he does hum the tune this time so she knows where it goes in the music and for how long it lasts before he resettles, folding his arms.]

Give it a try. Don't lean too far forward, and don't stay down for too long.