yeah, it happened after his temp soared to 39deg.
Last night wasn’t much fun, both of us were constantly waking up and checking him, as he was still having a high temperature every so often.
Yes, they are common, and fingers crossed we’ll not have another episode, but at least now we do have the manual!
They’re common enough that the childrens ward have a little booklet with checklist and pointers to follow if there should be a repeat attack.