When I'm on the verge between sleep and waking, there is often screaming in my head. My body often shakes, trembles and I feel a jolt seize my body. It's then that I wake and I have to remind myself that it's the present moment. Whatever I've been dreaming about is at the forefront of my mind and it's vivid, almost real until I realise I'm awake. Often in the second before I wake with a start I feel the presence of someone over me, grabbing me or jumping on me. But then it feels like they fall through me, and I can physically feel them falling through me body as I rise from laying down. This started about 6 months ago, and it's been happening regularly ever since. It's such a strange physical feeling. I'm momentarily frightened and it leaves me slightly breathless. Sometimes I can almost feel it about to happen when I begin to wake but I have no control over it. It's haunting and strange.