Nelsen said: "I was holding him but he just fell down. He does it to everybody in their box.
"I said to him 'That was a bit embarrassing, John' and he laughed when he ran off.
"The ref was smart enough to see it. Terry was nowhere near the ball, was never going to win it, so he just fell down. He was just trying to get a penalty.
"John's bigger than me and made me look really strong, actually. But if the ref gives that, it's ridiculous.
"If you really know the game, that's never a penalty."