Who did you guess the killer was going in?
First, bravo. I was skeptical going in due to all of the mixed reviews on this film, but I genuinely enjoyed watching it. Sure, it wasn't the best low-budget movie I've ever seen, but it was good. Especially since it only had a ~$500,000 budget, although I'm sure this was partly due to the fact that almost the whole movie was filmed in one small, closed in space. :p
Second, after reading the summary, I decided to try to guess who had the bomb before it was revealed in the movie. I initially thought it was the prego girl. It was fairly obvious that she loved the character who got her pregnant and kept dropping hints that there was something between them that was more than just coworkers. I thought she also seemed a bit unstable mentally or like something wasn't exactly right upstairs. My prediction was that she had the bomb somewhere on her (no idea where that it wouldn't have been seen) and planned to kill her lover and his fiance at the party out of jealous and a broken heart. But I guess then they wouldn't have been able to tie in the whole "you are a monster for screwing over all those innocent people" speech that everyone gave Henry Barton.