Seth found himself reminiscing of those old Anti-drug ads he had seen online a few times. The overly dramatic, concerned mother cracking an egg into a pan and letting it sizzle, only to look into the camera and say 'This is your brain on drugs.' as if that made any sense or would prevent anyone from taking drugs.
Well, if his brain was an egg then that egg was not being cracked into a pan to deliciously sizzle. Instead it was being drenched in oil, lit on fire with thermite and then casually tossed onto the surface of the closest sun.
Of course that made as much sense as the drugs comparison, but honestly that was the only way he could describe the overwhelming, searing sensation coursing through his grey matter at the moment and because of that sensation it was a little hard to concentrate on making a good metaphor.
I'm sure you can understand.