Fabio Splatter
This is when you are getting head on a roller coaster and you blow your load and hits the person in the seat behind you. Like when Fabio got hit by a bird riding a roller coaster. Look for Fabio hit in the face on YouTube for an example.
Guy in front "That was definitely the best roller coaster ride I've ever had" Guy behind him "Oh Fuck I wish I had kept my mouth shut during the ride, I never expected the Fabio Splatter!"