found, caught (someone doing something)
Подозреваемых застали врасплох.
The suspects were caught off guard.
Меня застали врасплох.
I was caught off guard.
И застали нас врасплох.
And they caught us by surprise.
— Битва у Красной скалы (2008)
Меня застали спящим в классе.
I was caught sleeping in class.