Eh cats don't run away, if they do they usually come back eventually anyways but yeah ... Every single cat owner has had that experience. I know I have!

I just learned eventually that you have to trust the cat is somewhere in the house playing hide and seek really well. They'll show back up for meals or treats. My cat always wanted to go outside but when given the opportunity she often changed her mind and just stayed in. Or when she was outside she stuck close to the door and went back in with me.