1. 12 Feet Deep - Two idiots decide they absolutely positively MUST go swimming in a pool after it's closed. An incredibly contrived sequence of events happens so they get stuck in a pool. So the movie can happen.

2. Frozen (not that one) - Three idiots decide they absolutely positively MUST get on a ski-lift after it's closed. To the point of bribing the operator who for some stupid reason doesn't say anything. Do the movie can happen. Also, Wolves are not that aggressive. They are typically shy and avoid humans.

3. 47 Meters Down- Arguably the most believable scenario on this list. It's still really stupid.

4. Fall- Two idiots decide to climb an abandoned radio tower without proper equipment that would make escaping their predicament trivially easy. Stop me if you've heard this one before

so the movie can happen.

Oneshot manga by Kou Hayashi.

Trailer 4 is in October 4!