Comment by Rowan CallaghanBurly young centre Jurenzo Julius’ stunning cameo for the Sharks against Toulouse in Durban last Saturday suggested that “The Boogie Man” is going to give a lot more opponents nightmares, and that coach John Plumtree should let him off his leash more often.The 20-year-old former Junior Springbok star sparked the Sharks, and the crowd, into life as he set up and scored their opening try in a style reminiscent of his playing days at Paul Roos Gymnasium and the junior national team, after coming on in the 58th minute of their Champions Cup clash at Kings…