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"As much as I would have loved that tour, I wouldn't have been able to pay my rent, which was very, very scary," she says.

He said he was very comfortable working with the critters during the photo shoot but noted, “Getting your gear off is way scarier than wrangling a croc!”

But after so much time away, and such a scary medical saga last summer, he was simply grateful to once again be back on the rubber.

Mr Cain said the Brazilian favelas were the scariest place he visited but added: "It was also the most fantastic and phenomenal place, I dreamed of going there since I was a kid".

Founder of the hubs, Tina Townsend, said the local demand for help was "quite scary".