While acoustic scattering is essentially a time domain phenomenon, studies of scattering from objects in water, and from boundaries, have often concentrated on time-independent/cw descriptions. There are, however, critical aspects of the scattering problem which become evident only in the time domain. In this paper, time-domain visualizations of impulse scattering from rigid, pressure-release, fluid, and elastic spheres are presented. The results provide important insights into the physical processes which lead to the construction of scattered wavefronts. Using this method, it is possible to time-separate and identify different scattering mechanisms: geometrical scatter; diffraction (which, for rigid spheres, gives rise to the circumferential wave); refraction; and wave conversion in the body of the scattering obstacle. Of particular interest is the characterization of the forward scatter region, where the process of wavefront healing can be directly observed. The presentation will be illustrated by movie animations. [Work supported by ONR.]