Have you ever had to?

In the spirit of Risk and Reward.  I give you the lyrics of The Mighty Mighty Boss Tones, and ask the same question.  Have you ever had to knock on wood?

Have you ever had the odds stacked up so high
You need a strength most don't possess?
Or has it ever come down to do or die?
You've got to rise above the rest
No, well

I've never had to knock on wood
But I know someone who has
Which makes me wonder if I could
It makes me wonder if I've
Never had to knock on wood
And I'm glad I haven't yet
Because I'm sure it isn't good
That's the impression that I get