I got my basic premise laid out 
[hider=My Hider]Kamala and Robbie are best friends that grew up together in the same apartment block in New York. At the age of 16, Robbie is able to finally save up for a car. He and Kamala take it for a joy-ride up the interstate when they are run off the road by a demonic ally possessed car. Kamala survives thanks to her Inhuman abilities activating to save her. Robbie is horrifically killed, but turns out that Mephisto isnt happy that his Knightmare is running rampant, so he makes a deal with Robbie, bring his Knightmare back to hell and become his Rider, or take his chances with the afterlife.

I really just want to have a scene where Robbie and Kamala meet up after the accident like:

Kamala: "ROBBIE!!! HOW DID YOU SURVIVE!?!?!? And how come there isnt a mark on you?"
Robbie: *Dont tell her you made a deal with Satan* "Miracle...? Wait, how did YOU survive?"
Kamala: *Dont tell him you're a mutant* "Allah...?"[/hider]