Foo Fighters frontman Dave Grohl raised an internet meme to an art form when he took the ALS Ice Bucket Challenge while parodying the epic prom scene from Carrie. John Travolta appeared in the 1976 horror film, and Stephen King wrote the book behind it. So Grohl name checks them both. Where Jack Black fits into the picture, I'm not exactly sure.
Donations to help find a cure for the horrific disease can be made over at the ALS Association. For a truly sobering account of what it's like to live with ALS, read Tony Judt's essay, "Night," in The New York Review of Books. It was published in February 2010, shortly before the disease took his life.