Invisible text frowned upon by Google? Even get you banned?

I would like to use a few sentences of invisible text at the bottom of my page. This text would be the same color as the background, so it would be invisible.

I heard Google may ban you if you do this with keywords, but I would be using the same text content that's embedded in my flash content. I would like to do this because Google doesn't read my flash text.

Anyone know if Google looks at this as no-no? Will they ban me?

Thanks in advance for anyone's help.