"It was a nightmare. For a couple of years after that, the joint kept dislocating. I couldn't hold anyone off and every time I fell over my shoulder would pop out of its socket.
"I couldn't go on like that. I had an operation last summer and I've been working in the gym to strengthen things. And now it's not a problem any more."
He added: "The first was particularly satisfying for me. It was a poacher's goal from close range and I don't usually score tap-ins.
"I think it was the first I've ever scored like that but, hopefully, there will be plenty more from now on. I'll take 10 of those a season every time.
"I was pretty pleased with the second goal as well because it was a left-footer. The manager has often said he sees me as a central striker in the long-term and, given the choice, that is where I would play.
"I find it more comfortable to be up front in a free role, allowed to go wherever I want on the pitch.
"But everyone knows I'll play anywhere to help the team - right, left or through the middle."