And not too long ago I stumbled on an idea.

To say the very least they stumbled on a lot more than ever expected.

He got to his feet and took a step, then another, but stumbled on the third.

Because when your man stumbled on us, do you know what he did?

In 1969, he stumbled on a new line of work.

"Would you believe that he just stumbled over it on his own?"

"They have stumbled on me again" he used to say.

Looking back over his shoulder, Jack had stumbled on the top step!

This time, she did not stumble on her way to the final.

There could be a chance I might stumble on some water.