But they think he must have stumbled upon the guys who did.
The first time, back in 1999, I just stumbled upon it.
How did we happen to stumble upon such a perfect moment?
Someone stumbling upon our conversation would believe we were talking about people.
Perhaps they would've come to mind had he not stumbled upon a couple of million in cash.
It's not hard to stumble upon free books these days.
By accident, he stumbled upon the two men and the girl.
I feel as if we had stumbled upon a black, hidden river, running under our very feet.
By accident my mother had stumbled upon her life's work.
He tried to imagine how the senator had stumbled upon the place.