Board Thread:General Discussion/@comment-7133676-20130513190722/@comment-8954026-20130513192345

A discussion was started after last week's episode when Tamara opened the portal. All other portal jumps had predesignated destinations but Tamara's didn't. We were wondering how it knew where to take people.

I think the conclusion was that whoever throws the bean controls the destination, assumably just by thinking it. If one is opened accidently/without forethought then it's believed to open on a random world (although quite conveniently for Neal this happened to be the EF - hmm)