Hypnagogia is the experience you have when you are falling asleep (but not quite asleep). When you’re waking up (but not quite awake) this is known as hypnapompia. Other terms for hypnagogia include: ‘visions of half-sleep’, ‘the borderland of sleep’, ‘half-dream state’ and ‘dreamlets’. The hypnagogic state can be characterised by many sensory experiences. These experiences can range…