All ferret owners are aware of the weasel wardance. This is the exuberant dance that all ferrets do when they are let out of their cage, or just want you to come and join in with their play.
They go completely batty and bounce around, like springboks, or they lunge at you with their mouths open then back away.
To the new ferret owner it can look frightening but believe me, your ferret isn’t trying to attack you. All they’re doing is urging you to drop everything and have fun with them!