I'm paging through my old Dragon issues, looking to streamline my closet, when I come across a Knight-class ability to defend another character from attack. It included a mechanic about giving Dodge bonus to another character, which I couldn't fathom, but it had me wondering:

How do you use the 3.5 rules to simulate body-guarding action? How does one character hide on the far side of another? Or how does one character move to consistently block another? Does Ready Action cover all the implications involved?

What other actions (like the infamous slide down a bannister) aren't clearly covered by the rules?