These refugees don't know dunks, nor do they know why a 25-year-old NBA star, coming off his breakout season, would fly more than 8,000 miles and 24 hours, risk malaria, typhoid and yellow fever, just to hang bed nets in their mud huts for the anti-malaria program Nothing But Nets. On his vacation. "Man, for a huge American sports star," said Nothing But Nets director Chris Helfrich, "he sure doesn't act like it."