“How — how’re we going to get in?” panted Ron. “I can — see the place — if we just had — Crookshanks again —”

“Crookshanks?” wheezed Hermione, bent double, clutching her chest. “Are you a wizard, or what?”

“Oh — right — yeah —”

Ron looked around, then directed his wand at a twig on the ground and said, “Wingardium Leviosa!” The twig flew up from the ground, spun through the air as if caught by a gust of wind, then zoomed directly at the trunk through the Willow’s ominously swaying branches. It jabbed at a place near the roots, and at once, the writhing tree became still.

“Perfect!” panted Hermione.

Harry Potter and the Deathly Hallows – J.K. Rowling