A sex position.
The man is sitting on a toilet in an entirely white room, taking a crap, as the girl is sitting on his lap fucking him. The girl is pregnant, and also has her period at the time as well. Both male and female are crying, and vomiting on each other. The male has a skunk duct taped to both arms, and is beating the girl senseless with the skunks bodies, producing a terrible stench on top of everything else. The girl must be in mid-labor and the male is fucking the baby back into the womb. Both members are sweating, and all bodily fluids are coming out at this time.
The only way The Number 8 is completed is if the man successfully ejaculates with all of the above occurring.
Frank: Wow John, you look awful...and you smell awful...and theres two dead skunks duct taped to your arms...what happened?
John: I just completed The Number 8...
Frank: Thats impressive.