Continuity mistake: When Tybalt smashes into the wall and breaks, there are a few pieces and he's shown to be hollow. But when he's put back together and is dancing at the end, his arm and leg break off and are now solid.
Continuity mistake: When Juliet take the fishing rod from the fishing-gnome there is a cork just above the hook. Later, when she has it in her hand, the cork is gone, even in the greenhouse scenes.
Continuity mistake: In the scene where Juliet is on her mission, the dog scares her and she drop the fishing rod. As it falls it disappears, then moments later the frog has it in her hand.
Continuity mistake: In the scene where the frog teases Juliet about a boyfriend, she has a rose, which she drops. It lies in the middle of the floor. As the frog jumps up and picks the yellow flower, the rose disappears.
Continuity mistake: In the scene where Juliet runs on the wall, at the start of her mission the fishing rod isn't on her back, it only reappears seconds later.
Continuity mistake: In the greenhouse scene, where Juliet is hanging from the window frame, the fishing rod disappears as she falls onto the pipe, she walks on. Only when she talks to Gnomeo, the rod is back.
Answer: The pedal she was glued to was most likely destroyed from beneath her, which freed her.