In the field of sleep study, the idea of “creative insomnia” is a controversial one. Can working through the wee small ones provide an inspired spark that can’t be achieved through ordinary means? Each year, it’s a question that the 48 Hour Film Project looks to answer. Across the country, filmmakers get one sleepless weekend to write, shoot, edit and score a short film. If you’re not inclined to drudge through each of SA’s caffeine-fueled projects on Wednesday at the Bijou, a best of screening occurs Sunday at the Rialto.