Everyone step up to the left side of their broomstick. Come on now, hurry up. Stick your right hand over the broom and say, Up.
10 seconds sound clip from the Harry Potter and the Sorcerer's Stone movie soundboard.
You can hear this line at 00:58:46 in the Blu-ray version of the movie.
Quote context
[...]
- Good afternoon, Madam Hooch.
- Good afternoon, Amanda. Good afternoon.
- Welcome to your first flying lesson.
- Well, what are you waiting for?
[...]