A tree surgeon's day nearly ends in tragedy after they plummet from an oak tree. And a cave adventure risks calamity when flash flooding causes an influx of water into a network of caves.

An adrenaline-fuelled base jump goes terrifyingly wrong when a parachute opens the wrong way, a freak lightning strike sets fire to an annexe with a young girl inside, and a terrifying road rage incident threatens the life of a cyclist and a pedestrian.