When Clumsy tries to pick up Gargamel's spell book, which is on a table, it falls down on him. In the next shot where the book is on top of Clumsy, he's on the floor. In the next shot of Clumsy and the spell book back up against the wall, they're both on the table. In the shot where Gargamel discovers his spell book has a missing page, the book is on the floor.