Knock wood, ward off the evil eye, I can't picture anything happening to them.

When I travel, the glitches (knock wood) have been more mundane.

My wife and I thought we had a great relationship - knock wood - and (secretly) held our marriage over other people's.

Then, a half decade later, knock wood, our Ruby.

Then he paused and added: "Knock wood - we've got three games left."

Knock wood, it's not only owls that keep things under control.

It is knocking wood for good health while knowing that medical calamities can show up at the most inconvenient times.

So I like to say, I'm a survivor - knock wood.

"And I still have all my original teeth - knock wood, again."

If you ask him why he knocks wood sometimes, he'll never say, For luck.