Pointer arithmetic on the "this" pointer

What are some legitimate and/or interesting uses for performing pointer-arithmetic on C++'s "this" pointer, if any?

Just to make SE pleased with the length of this question, I'll include some relevant code.

class Foo
{
    Foo(void)
        : _data(0)
    {}

    void Bar(void)
    {
        this->_data++;
        this[1].Bar();
    }

    int _data;
};