I have a nice story from this level: http://imgur.com/0uunnrU
In the end, between start and goal there is only a single block. I was the one opening that block, everybody went through, and I was trapped. One arrow, however, stayed behind, tried to help me get out, was stuck with me for some time, and told me to not clear that last block in order to have other people help me out without just going through.
Whoever you are, thanks <3