There have been some extremely physically and mentally demanding challenges on Im A Celebrity... Get Me Out Of Here! so far, but contestant Grant Denyer has said Thursday nights ice bucket challenge was so intense it nearly broke him and his campmates.

The 43-year-old and his co-stars Jack Vidgen, Pettifleur Berenger and Travis Varcoe were required to plunge into freezing cold water tanks and continuously swim to the base to pump a lever.

Grant said medics were rushed in after the challenge, with fear the campmates organs were getting close to shutting down.