Janey what a tale of woe that keys story is! Really felt for you - especially the bit about your OH thinking something awful had happened, tho I'm sure you were less light-hearted about it. Hope you can see the funny side now. Or soonish.
I, too, get periodic hip pains - sometimes in the night the outer edges of the right and sometmes left, too, hurt like buggery, which then leads to basically a dead leg feeling in the affected side. I hate it. I also, occasionally, get electrifying shooting pains through my bone in my hips which actually makes me jump it hurts so much. Fortunately it doesn't last long. The night-hips thing seems to come and go though, and sleeping with pillows propping up seems to help.
Had a weird trapped nerve thing the other night - it felt like someone was pouring a single drop of cold water over my shoulder and down my back - I couldn't reach it to scratch it so knew it was a nerve thing. Was so relieved that it had gone by the morning - felt somehting was crawling under my skin, gross 
Cavort I had that once a few weeks ago as I was falling asleep - was crazy! But actual being woken up in the middle of the night must suck. I think walking around can rock them to sleep, but then you'll be totally awake which defeats the object.
I feel quite lucky that Baby Bear seems to be a daytime bear - or I'm sleeping so deeply at the mo that it doens't bother me when it has a kicking sesh.
Hazle mine used to do that too! But now the kicking and head banging and bum rolling (that was a weird feeling - but kind of awesome, could really feel it was a bum shape, too) is so indiscriminate that a simple hand does not quiet it.
Was watching the boat race build up the other day after some lunch and BB was totally going for it. I grabbed OH and put his hand there and he said 'it's just your dinner digesting'. He eventually came round after 10 minutes of very strong kicks, the cheeky bugger.