Examples of Multiple Inheritance?

I am just off a chat with Stefan who asked about a real world example of Multiple inheritance. His teacher told his class there is no real need/use of it. Most of the coding can be done with Simple Inheritance. Now we like to ask our readers who hack or code if they know any good and useful examples of using Multiple inheritance. We don’t want any theoretical solution. We want to know how you solved a real problem. You can either email me (cocaman AT gmail.com), comment here or post on Stefans post.