Allow image to extend outside frame?

[RiverMonster]

Hi,

I have an image that I would like to extend outside the page layout frame at the bottom a little (about 30px). I would rather avoid having to create another page layout just for this instance.
The <img> element is inside a <p> element. Is there a way to do this using local styling in the topic? I tried setting a negative -30px margin-bottom for the <p> element but this did not work. Can it be done?

Thanks

Adrian