Live performances became problematic for Joy Division, due to Curtis's condition. Sumner later said, "We didn't have flashing lights, but sometimes a particular drum beat would do something to him. He'd go off in a trance for a bit, then he'd lose it and have a[n epileptic] fit. We'd have to stop the show and carry him off to the dressing-room where he'd cry his eyes out because this appalling thing had just happened to him.