On a white-water wishlist trek Abi Jackson overcomes her fears in and out of the water
This time last week, I was at my office desk. Now, deep inside the Grand Canyon, on the banks of the Colorado River, miles from civilisation, I'm lying under the stars.
It's night three of my seven-day adventure with Grand Canyon Whitewater, who offer guided rafting trips ideal for completely inexperienced adventurers such as me. Their rafts are motorised, which means there's no paddling involved, and their articulated design makes them particularly adept at negotiating the rapids.
Incredibly, they somehow also manage to carry enough grub to keep us very well fed for the week — we feast on fajitas, steaks and chilli, among other things — cots for all of us, plentiful drinking water, first-aid kits and "Oscar" the chemical toilet.
There are 26 of us. A few days earlier, we had assembled outside a motel in a remote corner of the northern Arizona Desert, giddy with excitement and clutching our rucksacks.
Ranging from 13 to 80-something, we are students, teachers, office workers, a marine biologist and even a brain surgeon. But this week we are level-pegging and we've spent the past two days arm-to-arm on rafts for about seven hours a day, squealing together as we crash through rapids, working together to unload/load supplies and set up camp, and washing and peeing together in the river (peeing on the banks and side-streams is strictly forbidden).