My friends bike accident makes the 4th seizure I have seen in the last 8 years.  The surrounding accident confused me at the time, but the seizure is clearly separable. 

For those of you who don't see the relation or can't sort out the parts, I will outline a seizure based on my experience.  I think every one I have seen have been grand mal seizures. (I AM NOT A DOCTOR OR ANY KIND OF MEDICAL PROFESSIONAL, ASK A PROFESSIONAL IF YOU REALLY NEED TO KNOW)

Phase 0: A sudden shout or jerking of limbs.  I call it phase zero because I have only seen it once.  It looked like she was trying to call a friend or summon a manager.  But it meant something to my mom and she acted on it.

Phase 1: Fainting, if there was no Phase 0, it looks totally innocent.  The victim falls limp.  It looks almost like sleep.  They stay limp for a bit and it might seem safe to approach, I watched my mom pull an epileptic clerk (who had a Phase 0) from her booth and safely lay her down where she couldn't get hurt.  But be careful because I also saw a surgeon narrowly avoid getting punched in the face when, with out Phase 0, suddenly...

Phase 2: The patient begins to convulse.  Any muscle can malfunction now.  This can be really freaky.  Gurgling noises seem to be common but the rest can vary a lot.  The torso at minimum will convulse, but the limbs can become dramatically involved like a marionette with a rookie operator.  I've even seen the patient turn bright red, open blood shot eyes that didn't seem to see or respond to anything and then do the marionette thing, while at the same time seeming to attempt communication.  This has to be what people saw when they said someone was possessed.  Main point keep your self safe from the patient now.  But don't go far, stay near their head if you can. There is a real risk that the patient will vomit.  I don't say this to be gross.  If they inhale this they could get aspiration pneumonia.  I have only seen one seizure result in vomiting, fortunately the patient wasn't punching so she could be safely positioned to avoid aspiration.  Try to keep the airway clear.  This phase will pass soon enough.  NEVER NEVER RESTRAIN A PERSON HAVING CONVULSIONS. Chance are high one or both of you will get hurt, the convulsions can be very strong.

Phase 3: When the convulsions stop the patient falls completely unconscious. Okay technically the patient is unconscious from the moment they faint.  Its just that all the jerking around isn't what I think of when I think of unconscious people.  Anyway at this point you are safe.  All the victims I have seen have been breathing calmly and easily at this point and begin to return to normal skin tones. (Blood shot eyes take longer.)  Of course it doesn't hurt to check that they are still breathing. You are near the head right?

Phase 4: Gradually the patient wakes up.  They are going to be really confused.  It will take a bit of time to become reoriented.  At first the patient may not be able to respond.  But they will be looking at your face rather than past or through you.  It will be a bit like waking someone up who hasn't had enough sleep yet.  They may have trouble looking at you for long because they may feel dizzy.  You may not sound coherent to them.  That's okay.

Phase 5: An exhausted but otherwise normal person is back, assuming they didn't get injured somewhere between Phase 0 and now.