This fate was the most terrifying prospect of all. (janefriedman.com)
It could be a fairly terrifying prospect, but one knew one would go eventually. (faith.org.uk)
The defined territory requirement is tricky, since scientists have been saying there's no such thing as a single Great Pacific Garbage Patch; rather, plastic waste is diffused throughout all ocean waters (a significantly more terrifying prospect) and there are numerous trash vortexes in waterways. (treehugger.com)