I'm not a volleyball expert, but I'm pretty sure this all checks out.
I actually went back and edited the previous page a bit to make Spikey-haired girl's eyes closer to how I want them. I was really tired when I made that comic, and I don't think it was my A-game.
I was feeling better drawing this comic, and Grace in panel two is evidence of that. I like when Grace winds up pointing in separate directions with crossed arms.