sounds like what I would call a night terror.
when dealing with Matthew's sleep disturbances a while ago, we fast came to the conclusion that actully intervening by touching him made things worse, he would end up flailing around, he'd ask for milk - we'd get milk for him and he flung it across the room and then ask for milk again. It really is as if he doesn't know what he wants and whatever he asks for actually isn't 'it'. Our way of helping him, is to simply go in, and reassure him that mummy / daddy are here... you're safe... we love you... night night. The more we try and help and comfort him the longer it takes for him and the worse it gets. After one particularly rough one, I ended up having to completely 'reset' bedtime. He was happy being held - looking out the window etc. So we said night night to the road and the neighbours houses, read a story, tucked him back in and he went straight to sleep.
Matthew terrors always happen between 10-11pm on a Thursday - one of the days he goes to nursery and therefore doesn't get as much daytime sleep as normal.
the waking about and hour before is a similar idea to the wake-to-sleep method. The reason why the terrors hit seems, to me, to be linked to the change in sleep cycle between different phases and get stuck between 2 (can't remember which ones though), so rousing him or at least getting him to roll over etc helps to nudge him to the next sleep phase.
i've also read that it could also be linked to bladder control.
Hope this has helped.
Alex