So I guess I missed the talk of why Axle is sitting. Broken leg?

I've seen one concert, Nazerath (Razamsnaz, Hair of the Dog, Love Hurts) where the lead singer (Dan Mcafferty) just broke a leg. He actually sang sitting on a table. Extremely disappointed. This is a high energy band and just seeing them sit and stand there turned out to be very boring. Oh well, what ya gonna do?