A good server keeps his back dead straight and his right knee will bend and hit the ground right next to his left ankle. He will pause for a second then rise, again keeping his back straight. All the while his hands remain joined in the same position in the middle of the chest.
And if you're trained by the FSSP, you might actually have to clap your hands or click you fingers if you're the head server and it's time for the procession to genuflect in unison. I believe our servers are trained well enough not to need that!