The key to a good interview is adaptability. An interviewer can exhaustively prepare and research both their subjects and their audience, but no amount of preparation can fix things if something doesn't work on the day of the interview. Documentary filmmaker Belinda Sallin is clearly familiar with the subject of her docu-character study "Dark Star: H.R. Giger's World" is, or at least familiar with the aspects of Swiss artist H.R. Giger's work she most wanted to highlight. Sallin is also sensitive to the fact that she filmed Giger, the designer of the monster in "Alien" and the creator of numerous influential "bio-mechanical" works of air-brush art, when Giger's health was ailing him at the age of 74. "H.R. Giger's World" isn't just remarkable because of Sallin's appropriately existential focus on the people that regularly visited Giger during his final days. It's also genuinely warm and involving because of the p