(adnd 2e) emotion spell, and strange consequences if you can move while concentrating or if the emotion persists when the creature leaves

The spell lets you target a 20ft cube, and people in the are are struck by emotion. But when does it end? Can i cast "hate" on a dude in town, and he will attack random passersbys until you drop concentration a hour later
If you can leave the town afterwards its even stranger.

So: Can you walk while concentrating on spell? Does emotion last once you leave the area?