Hi, just wanted to share my experience with anyone who reads this message, and this was the only way I was able to - Hope I'm on the right page.
I've been a sufferer for more than 12 years now. My latest episodes just started recently 2 days ago, after a 2 year pain free period! (My personal longest - thought i was cured...). Anyway, what I wanted to say that during those 12 years, I've learned to adapt especially the last 6 years. The first 6, it's exactly as everyone described in their posts, the pain is so strong, you wish to die, crack your head against the wall, stay in dark places, never go out of the house, and chew up on the pain killers like candy... I tried everything, but it seems year on year, the episodes were becoming longer and deeper...
Just up until 6 years, I was experiencing a cluster during work, and had a very important meeting which I couldn't get out off.. imagine that, experiencing a cluster while sitting down and listening to people without moving. Anyway, I excused my self to the bathroom to see what I can do, and started banging my head against the wall and shaking, and suddenly the pain was vanishing slowly, or better yet, the piercing feeling above my eye and side of my head was being diverted, and I noticed that it was because I was moving my head in a certain pattern. I kept on doing this for around 5 min, and believe it or not I was pain free... So throughout these 6 years I was using this exercise and developed it to suit me, and believe me it has made my life easier. 8 out of 10 times, I can abort a cluster within 10-20 min and during that exercise I'm not feeling the piercing pain, just a bit psychological pain knowing the cluster and some annoyance, but who would care knowing that the cluster would end after

A sufferer knows when a cluster is about to hit, so when you get that feeling, just wait a bit until it's about to peak, and then what you do is start moving your head from left to right quickly and non-stop (and not just moving it, it has to be in a snappy way and feel it, you have to feel your neck moving with it)... This exercise normally help the cluster to peak faster, better than waiting for it, and then you feel it. So I keep going with the exercise, and moving my body as well to a song or something to divert cause we all know that helps. A dark place helps better. I always try to make a pleasant experience out of this regardless of how painful it is, and set my mind positively like I'm on a mission, fighting and dancing the cluster away. During the exercise, which is the best thing about it, you always manage to get over the piercing pain which is the best part of it. I still feel pain during and I keep going and going, it's like having a fight with the cluster, until I get over it. Many times I get frustrated and depressed and tired and want to stop, but I never gave up on this exercise, and in the end I always manage with it to end my pain. It's all about patience and fighting for relief... (personally I was living on pain killers and meds, and oxygen wasn't always availalbe, this was my personal savior).
It's been 6 years now, and knowing this exercise always made me feel better, like having a weapon ready when the time comes. (I do it wherever possible: Bathroom is where I normally end up when outside the house, the first one I can get my hands on

.. )
As I said, I started having the episodes 2 nights ago, non-stop up to 5 times a sleep: Always woke up, went in my dark living room, started the exercise 20 min, back to sleep, till the next episode....
Now this is my personal experience, and so far it has made my life much better... So for anyone who reads this, trust me it's worth a shot, and I really hope it works for you in a way or another. Personally I've taken a lot of shots on whatever I can get my hands on and was advised for easing the pain. We all know that the pain is to freaky not to try anything that is available. In my advised exercise, the most important thing is not to give up, cause at the end you will beat it.
I really hope my experience would help in any way, cause probably we are one of the fewest people on earth who know the true meaning of pain....