at 6:31 in this video it does it.It also does it a lot up until the 8 minute mark. I know that the video was put together with after effects. I need to know how i can do it in cs5 or at least what it is called so i can look up tutorials. Thanks
Effects --> Time --> Echo and a million similar "accumulation" effects from third-party vendors, fancied up of course with some crazy coloring effects.