Such a waste of good ideas!

Not that bad. I thought this was a good thriller, and I loved the 'twist'. I really enjoyed the conclusion. It was a little hard to follow at times, and I could have done without the short start, re-do, and ending format. However, I don't feel like that ruined the movie. I would recommend giving it a try - it's not perfect, but it's also not the worst movie ever.

Previously adapted as a Twilight Zone episode, Stephen King’s short story Grandmother is adapted once again, this time as the low-budget supernatural horror film Mercy. The story follows a young boy who cares for his infirmed grandmother and slowly begins to suspect that she’s a witch after he learns some disturbing things about her past. The pacing is terrible; the film’s not even 80 min. but feels three times that. And the acting is pretty poor, especially the lead kid. The writing isn’t that good either, leaving a lot of questions unanswered (particularly the ending, which is very ambiguous). Mercy is a meandering atmospheric horror film that really doesn’t offer too many scares.