Last Friday, the rock group Hairball performed the song 'Detroit Rock City' as a tribute to Kiss, during a concert in Sioux City Iowa. Suddenly a spark from a firework fired in long hair of the singer and guitarist Bobby Jensen. The technical team members intervened to extinguish the fire, while Bobby Jensen continued singing as if nothing had happened. Later, the singer said: 'We are always prepared so I didn't panic. I have 100% confidence in my team, and I knew I would be taken care of quickly'.