startling

The audience felt that a startling revelation was to follow this ominous prelude.

The scene of the previous night now came back to his mind with startling clearness.

Sherlock Holmes’ earnest demeanour had so far convinced us that we all sat in silence, watching the animal intently, and expecting some startling effect.

So startling would his results appear to the uninitiated that until they learned the processes by which he had arrived at them they might well consider him as a necromancer.