I was at Reading when Demel went down as if shot after just four minutes with no Reading player within spitting distance of him. That was just his second appearance - in December - and we didn't then see him again until April, when that nasty, inclement British winter weather was over!
Mind you, based on his performance against Blackpool at Wembley, it is probably a blessing that the guy is a sick note. Premiership players will rip him apart given his lumbering lack of pace.
For such a big bugger, he is remarkably fragile. I would encourage Allardyce to give him a kick up the arse, but his anus would no doubt shatter!