You know what it looks like… but what is it called?
TAKE THE QUIZ“by-surprise”
The following 2 entries include the term by-surprise.
catch (someone or something) by surprise
idiom: to happen to (someone or something) unexpectedly : to surprise (someone or something)
take (someone or something) by surprise
idiom: to happen to (someone or something) unexpectedly : to surprise (someone or something)
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Merriam-Webster unabridged