What does my dream mean?

I dreamt that there was a small group of girls all aged about 15. They were walking up a flight of stairs to get on a rollercoaster. The larger one of the group then walked a different way, because she'd heard the rollercoaster was going to collapse. The Larger girl then saw another group of girls and warned them about the rollercoaster, before she could finish the stairs collapsed beneath her and she plunged to her death. Only the hefty girl did though, the others were all saved by their friends when they began to fall, does this mean anything ..?