From My Famous Friend an insightful feature piece on Stephanie March back in 2006:
Stephanie has always been horribly superstitious, and the mention of anything important causes her to knock on wood. This makes it amusing to talk about important things where no wood is present—in a car, perhaps, or a big pool.
… And when being interviewed, it seems. Here she knocks on her own head when asked to comment on Farah Fawcett’s battle with cancer:
The cuteness, iz killin me.