YOU SAID:
wizards swayed their hips at the furious hippopotamous
INTO JAPANESE
ウィザードは猛烈なカバで腰を振った
BACK INTO ENGLISH
The wizard shook his back with a furious hippo
INTO JAPANESE
ウィザードは猛烈なカバで背中を振った
BACK INTO ENGLISH
The wizard shook his back with a furious hippo
That didn't even make that much sense in English.