Is there a single word for the feeling you have in the moment you successfully avert a bad outcome and simultaneously realise what would have happened if you had failed to do so? For example catching a dropped knife and realising as you know you have successfully grabbed it that if you'd missed it would have stabbed you in the foot.
In a sentence it would look something like this "She had a moment of [...] as she realised what would have happened if she'd missed her snatch for the vase."
It's an example of juxtaposition, between success and failure, but that doesn't describe the feeling at that moment. It often causes an adrenaline rush but that's non-specific, it might also be characterised as a moment of horror but again that can mean many things while this is a distinct, mixed, sensation.
I can say "...a moment of [relief mixed with horror] as she realised..." but I want to use one word if such a thing exists and without resorting to a non-English term if at all possible though of necessity such a term could be used as the piece is one involving culturally blanded characters.