Idiom for restlessness
Someone who is anxious may be said to have ants in their pants.
As restless as a cat on a hot tin roof.
There are few choice idioms for restlessness in English, including:
Sitting on pins and needles
At sixes and sevens
As jumpy as a puppet
And a whole bunch of amusing ones here: http://www.thefreedictionary.com/restlessness