it opens a portal right where ur char is standi g, like the one to the cow lvl.
u have just pay attention not to open 2 portals at same place(like when cube is in stash.... if u have bad luck u cant go into the one portal! because its covered of the other one..
btw, yesterday i couldnt play, something is going on on east server!
battle net technicans have holidays... so maybe they started the massive search engine to find dupes/bots whatever
or some ppl are lagging the servers that badly for duping....
i will look what its going on now