Paragraph with no width - 1
This tall float covers the block boxes that follow it. They don't recognize that the float exists. Only inline elements in the box do so.
Depending on how long the text in this float is, it can continue down and cover other block level elements.
Right floated box nested in the first div. Notice that the float starts inside the containing div, it overlaps the other block elements the same way as the left floating box.
This paragraph has no width assigned to it. Notice that the div element it is in, flows next to the left float and it flows to the left of the right float.
Paragraph with no width - 2