sanjay gupta md. it started right now. >>> park inson's, it's like you are crossing the road, you get stuck in the middle and you know the bus is coming and you can't get out of the way. so, you can kind of freak out and go, that bus is going to hit me at some point even though you don't know how fast or how big. >> welcome to a special edition of sgmd. there's so much we don't know about parkinson's disease. michael j. fox is the handsome face of parkinson's. he's had it for nine years now. what is he going to do with the $200 million he's raised? he dunlt do a lot of long interviews because he gets so tired. today, he had a lot to say. >> when i said i was interviewing you, people said how is he doing? again, i don't want to belabor that but you are doing okay? >> yeah, what i was going to say was that i refer to it and the effect it's had on my life as gift. people are dubious about that. they wonder how i can say that. i quantify it by saying it's a gift to keep on taking. it's opened me up to pas