The callers are set up to be Michelle and Lisi. I have no idea what the thinking is behind making Lisi the caller for Moto, but I suppose that's the team's decision. Maybe they think she'll find her happy place if they let her do all the yelling. Lisi is leading Alex, and Michelle is leading Stacy. Go! From the beginning, it's fairly clear that Michelle has the gift for caller work, and Lisi does not. Not only that, but Michelle dances around adorably as she yells out things like, "Go forward, go forward, go forward, go forward!" She's like a cheerleader, only with more of a direct purpose. (Oh, keep your saddle shoes on. Don't email me.) Stacy has her tiles on the table in no time, while Alex is now ineffectually swinging his club (heh) menacingly, missing everything as the skull swings in the air. So apparently, he managed to hit it, but not break it, and that's why it's swinging. Lisi basically has him right where he needs to be; it's the swinging that's a problem. She tells him to let the thing stop swinging, but then the skull falls to the ground, so she has to lead him to it and have him smash it there.
Cassandra is the second person out for Moto before Alex even drops off his tiles. As soon as Alex gets back, he demands that Lisi let him do the calling, even though it doesn't actually appear to me that she did all that bad a job. I don't know that the swinging was really her fault, you know? But in any event, Alex orders her to get down, and she does. Alex opens his calling career by leading Edgardo to crash into a pole. Welcome to Alex's gift for leadership, Blunt Metaphor Edition.
Michelle is leading Cassandra, once again shimmying her hips with excitement as she does. Cassandra is also giddy over finding and delivering the tiles, and then she's on her way back.