Well, this would be the first of my 470 posts where I feel I should be able to contribute a little !!
Firstly, the most important tool for a pediatrician is actually seeing the kid in the flesh, so to speak. A verbal history will not be enough.
But. I presume he is otherwise a healthy baby, eating well, gaining weight, reaching the expected milestones in terms of motor and verbal development and just generally an energetic and happy kid ?
This episodes. How long ? Stay conscious ? Crying ? Shivering or jerking ? The whole body ? Only the limbs ? Only one side ? How is he behaving directly afterwords ? Sleepy ?
All in all, at first glance of your description, I would expect this to be normal. We get a lot of this from worried parents. Small children have a tendency to scare the crap out of their parents with the most peculiar behavior.
BTW, checking the temp is most likely worthless.
As said you would need to see the child, preferably when it happens.
Best,