From Hikari no Kiseki forums:

"RO? Well, picture this:

You have a steak on your plate. Then you take your fork, and stick it into the steak. The steak is very juicy.

Because it is juicy, you pull the fork out to see if it will slide out. But how can you eat a steak if the fork is not in the steak? You stick your fork back into the steak again.

This time, though, the steak is being sneaky. Due to the fresh holes from your previous poking of the steak, it slips off with ease when you raise it to your mouth.

So you stick the fork int he steak yet again.

It slips off again. Stick it in. It slips off. And again. And again. And again.

You feel the anger swelling inside you, mixed with hunger, and you begin viciously stabbing the steak with your fork repeatedly. Stab! Stab! Stab! Yet it continues to slip away. You think that perhaps with another few hours you might finally be able to eat something.

A few hours pass, and you still haven't eaten anything. At this point you just don't care, but you do think you would like to eat dinner at some point--ah, someone just make it stop! Please! ...And so you continue stabbing (slightly less viciously this time) at the steak, but you don't know why.

...

That's RO."