When severe explosive diarrhea collides with a weak O-Ring at a high velocity (Normally catching the shittee by surprise). Usually, illness causes the pasty, green color.
Digestive fluid will typically cause assburn.
'Normal',
brown, explosive/projectile diarrhea is usually referred to as a Chocolate
Shotgun.
The difference being in color and the presence of assburn (only seen with the Guacamole
Shotgun, other severe illnesses, or very large, healthy pieces of shit).
Bleeding is a common occurance.