In reality, Worf was masquerading as a Boraalan seer while the group was being moved from Boraal II to Vacca VI on the USS Enterprise-D holodeck. The hologrid became visible to a Boraalan, and Worf improvised the term to explain the malfunction and alert La Forge, who had been monitoring the situation over a communications channel, to the problem. (TNG: "Homeward" )