OOC: Dana's Space is 15ft, so 40n was correct. He moved adjacent to the big boy. Oh, and Dana is male in this case.
Dana moves to 40n60e, out of the cloud. (Provokes an AoO but unsure if concealment applies.) He then mumbles in abyssal, "Two can play this game, wise guy." He concentrates and an identical, ghastly, yellow-green cloud appears, centered at 60n90e.