User blog comment:Darkcloud1111/Official "The Sea of Monsters (movie)" Discussion/@comment-180964-20130401165526/@comment-180964-20130401215301

I don't think with ever mentioned in the first film in might of had a small reference of some kind in the first film but it was never state it was because of The Mist. An like you state the hotel maid saw Medusa's severed head perfectly enough to scream scared of seeing Grover holding a severed head.