title: Openlayers fit extent with bounce
body: <p>I am attempting to animate between two extents, with an increase in zoom during the middle of the animation, to create a bouncing or flying effect when going between locations which are far apart.  Right now I am using view.fit(extent, {duration: 2000}).  The problem is the zoom does not change at all during the animation.  When I am panning from one extent to another which are far apart, you just see a bunch of tiles flying by at a very low zoom level.</p>