It was Dad’s idea, of course. He’s into all that survival stuff. His idea of a family holiday is crossing the Sahara by camel. We had to drink our own pee. Last year it was Siberia. I lost three toes to frostbite. So when the auditions for a new TV show called Extreme Jungle Family Challenge came up he was first in line. The idea was simple; drop an “ordinary” family into the Amazon rainforest wi…