The nature of the CoverFlow is such that items are scrolled in either direction and when reaching any of the edges the scrolling should stop there. This is the essence of any coverflow control.
Nevertheless if you wish to enrich the functionality of the coverflow rotator, then you can use the client-side API to scroll directly to the item of your choice through the set_currentItemIndex method, i.e. the first item:
For more information on the client-side API here is a link to a help article - http://www.telerik.com/help/aspnet-ajax/rotator-client-side-api.html
Still, using this method, the control will scroll through all the other items until it reaches the first one.
Hope this helps.
the Telerik team