I have created a 3D company logo using Solidworks for use in a promotional video.  I utilized the Animation Wizard and came out with a nice collapse animation with cameras and lighting to show off the company in the opening scene.  After showing it to my boss, he was wondering if there was a way to vary the speed to have it collapse at a constant speed at the beginning, then at a specified point in the timeline, increase the speed so that the blocks [in this case, say two blocks of wood] "crash" together.  To be more specific, in a 15 second animation, the speed for 8 seconds will be at 1x, then after the 8 seconds have elapsed, it speeds up to about 2x.  Is this possible?