There's also the case of Robin Williams' death (allegedly a suicide) being foreshadowed by a role he played. I think it comes down to psychology; everyone sees the world through our own prism. We are not the free-thinkers we think we are, and that we dont appreciate the extent to which our next thought will be limited to our immediate influences, and for actors, that includes the lines they've had to memorize. That's why it's good to subject ourselves to a variety of influences, it gives us a bigger bag of ideas to take from.