What is one way that Cadence describes a headache in the novel, We Were Liars?

The ivory goose first appears in one of Cadence’s descriptions of a headache. She says a witch hits her over the head multiple times with the goose, giving her a headache that keeps her from attending supper at Clairmont her first night on the island. Later, it is learned that Harris bought this goose for Tipper even though ivory was illegal. Before they set fire to Clairmont The Liars take this goose, along with some other ivory sculptures owned by the family, and smash them.