Complex sentence: When upset, Genie would wildly spit, blow her nose into her clothing, and scratch and strike herself; her face stayed completely expressionless, and she never cried or vocalized.
Split into simpler sentences: When upset, Genie would wildly spit, blow her nose into her clothing, and scratch and strike herself. During these tantrums her face stayed completely expressionless, and she never cried or vocalized.