Approval workflow: can an approver reject an item that they previously approved?

Question

As I understand, the SharePoint 2010 workflow creates Task items for each approval, and once the task is closed (either approved or rejected), that's it. Can this be modified so that approvers can change their mind?

Answer 1

All I can think is to create a custom user control for this, it would have to set the property back to pending. I can't find a way in a normal workflow, and a user control is better than a visual studio workflow in my book.