The first lesson charms professor Filius Flitwick gives first year students is Wingardium leviosa, a levitation charm with which they attempt to make an abject -in this case a feather- rise up. He reminds them to follow a precise wand movement : ' swish and flick ' .



Ron weaskey is annoyed by hermione 's assistance during charms class but he proves he listened to her when a troll invades hogwarts castle on Halloween and traps hermione in a bathroom. Ron casts the spell so that the troll's heavy club floats up and then drops down on its head , knocking it out