This is a scene from my fanfic “Crossed Equestria: Outbreak” the context is that Neon Light came out of a restaurant that had exploded, after killing everypony inside, there was a gas leak causing the restaurant to explode with him inside, while burning in flames, he goes in search of more victims, Twilight meets him, but obviously she runs away and does nothing to him. Roseluck on the other hand, may she rest in peace.
This is a random idea that just popped into my head, if crossed are resistant to pain, making one trot on fire and act as if nothing happened would be very cool and terrifying at the same time. “Brother this is very cool, I’m going to put it in my story” and so this image was created.