With each passing second, as more of the ice melted, the end of the block lightened, tipping the remainder. Already the mass was inching over in a continuous grinding crunch, pulled by the slow force of gravity. When enough of it had turned to water the huge block would tip into the slideway and begin its ponderous rush toward Jess. It would bear down with all of its tonnage, like a giant sledge, and the vulnerable body of the girl would be caught between the ice faces as they smashed together.
