He didnt fall from space. He lived at the bottom of the ocean and ate Seabed Nectar, the prime ingredient in Slush-O! I'm not kidding on any of this. It's all part of the viral advertising campaign that failed horribly.

Seabed's Nectar (Kaitei no mitsu) is the secret ingredient for Slusho! It is highly addictive and seems to affect the human mind if eaten in its raw form. "Discovered on the deep ocean floor, under amazing pressure and extreme cold." The Parasites found on Clover's body have extremely high levels of Seabed's Nectar in their blood, and have been photographed digging into the ocean floor near the site of Chuai Station.

This abomination of a site was also part of that ad campaign.