No, It Ain't Blob The Builder
Pulsating blobs filmed in a North Carolina sewer prompting speculation they were an 'alien' lifeform have been identified as worms. The slimy sacs were filmed clinging to the crevices of a sewer and shying away from the light as a camera was passed along the pipes. Footage posted on YouTube attracted more than four million hits.
FOOTNOTE: Not creepy, just crawly.