England centre Mike Tindall has labelled teammate Manu Tuilagi a "freak", because of his pace and power.
A similar description was given by Will Carling in 1995 when talking about New Zealand great Jonah Lomu, who has recently been admitted to hospital because of a kidney problem.
"Manu is getting better and better so it will take something to go wrong to knock him out of that spot," said Tindall, who has had to move to inside centre to accommodate Tuilagi at outside centre. "He's a freak to be honest, in the nicest possible way.
"The power he's got and his feet and that little change of pace...He's got a massive fend and it just makes it difficult for people to tackle him.
"Even if people do tackle him he's always half-through and we can play off quick ball. He's a handful."
England's next World Cup game is on Saturday against Scotland, who narrowly lost to Argentina on Sunday morning.