‘Some of your roots will break, but don’t worry,’ Kostas said. ‘The ones remaining will be more than enough to keep you alive.’ Trying to maintain my composure, trying not to panic, I sent a quick warning down below, informing my subterranean limbs that in a few seconds many of them would die. Just as swiftly they responded in hundreds of minute signals telling me that they knew what was coming. They were ready.