Forum:Sniny Swirly Things in GTA:Chinatown Wars

I have been looking all over for an answer but I just cant seem to find one. Has anybody seen those shiny swirling things around Liberty City in GTA:Chinatown Wars? they are all over the place and are almost always in out of the way places(i know of one around the back of Chan's garage that requires you to walk all the way around the dock). If anyone knows their purpose please help.