Character mistake: Throughout the whole movie, Mary Anne has an e at the end, yet in the note her mother wrote to Tom, Anne has no e at the end. It even has an e at the end in the ending credits.
Character mistake: Mary Ann's mother's name is Janet. At the end when Tom is reading the note she wrote, she misspells her own name as Janent.
Answer: Machine first rips off the tape then slits his throat with a knife he had hidden. If you put the movie in slow play, you will see what I mean.