The phrase "shocking realisation" is correct and usable in written English
It can be used to describe a sudden and unexpected understanding or recognition that is disturbing or unsettling. Example: "As she slowly pieced together the evidence, a shocking realisation dawned on her - her best friend had been lying to her for years."
Totting this all up in my head was exactly the shocking realisation I needed.
It came as a shocking realisation to Tamara Rojo that, during her long career as a ballerina, she'd never once performed in a work created by a woman.
With Lesbia's new-found freedom came new boyfriends, and the shocking realisation to Catullus that what he had to offer counted for little with this rich woman, she was never going to marry him.
This tension is at the heart of Sue Klebold's gripping, troubling and bestselling memoir, A Mother's Reckoning: Living in the Aftermath of Tragedy, which recounts one of the most horrible experiences a parent can endure: the death of a child, compounded by the shocking realisation that you failed to know him.
The hot, claustrophobic horror of the body bags and the shocking realisation that people are dying just beyond our own horizon will fill all but the most fascistic viewer with a mix of guilt, unease and a desire to do something.
The shocking realisation that many people report is that everything they discover that improves their self-acceptance is something they already knew.
Almost as shocking is the realisation that the numbers may be underestimated.
Mr. President, it is hard to imagine a more difficult and shocking obstacle to the realisation of human rights than the commercial sexual exploitation of children.
These are occasions that give exploited youth a voice in the fight to eliminate some of the most difficult and shocking obstacles to the realisation of child rights.
More shocking than the sound of the laughter was the realisation that it was appropriate, a sort of emotional palate-cleanser to prepare for the end.
For those of us who remember what a happy, friendly place Mali was 10 years ago, the realisation of how bad the situation has become was particularly shocking.
