EDIT: Based on comment that this is the only utility-nav element that works this way...
It's a bit confusing to put an email sign-up form (like for a newsletter) above everything else. Seems like a way to trick people into signing up when they simply want to log in to the site - not a good way to win customer trust. More importantly, putting the form up there doesn't leave any room to explain the benefits of signing up or give me any reason to give you my email address or zip code (therefore I probably won't, which likely isn't the result your client is hoping for). This also seems much better suited to linking to a separate page to explain why the newsletter is awesome & ask them to sign up once they're convinced by its awesomeness.
If the client insists on keeping the form on this page, perhaps instead place it directly below the text, with a downward-facing arrow. The arrow could be brown at first & then red when selected. No rotation necessary, and people won't be as confused by the break from convention.
If this doesn't fly either & the client insists on having the form up above, try recoloring the form to make it more obvious & animate an arrow/line from the text to the form as it appears. Rather than animate the form down as part of the page, animate it up from the "Email Sign-up" text so its origin is obvious.