Johnson could be heard saying: "No, I got it, I got it, I got it. It's like O.J. Simpson," as he struggled to put on protective gloves during a visit to a vaccination centre in Cwmbran, south Wales.
O.J. Simpson who was accused of murdering his ex-wife, Nicole Brown Simpson, and her friend Ronald Goldman, was instructed to put on gloves used as evidence in the 1995 murder trial.
Simpson was acquitted of the murders two decades ago during the so-called "trial of the century," though his reputation - built atop a Hall of Fame football career as well as years as a popular pitchman and actor - suffered permanent damage.