Making actions, needing nouns.

So, I’m trying to make a “roll over” action. It’s only going to be for one turn, to progress the story. However, Inform always wants me to put a noun after my command. Is there a way to get round this?

Code:
Rolling is an action applying to one thing.
Understand “Roll over” as rolling.

After rolling:
say “blah blah”;

Game:

roll over

You must supply a noun.

The action doesn’t apply to anything, so “applying to one thing” is wrong. Try “Rolling is an action applying to nothing.”

Cheers. I saw that “apply to one thing” somewhere else and just went with it.