In reply to philhilo:
First question is, have they been formerly diagnosed and are they on medication to control them?
If not, they should get to the docs as the DVLA need to be informed and they may have to give up driving until the seizures are under control.
My personal view, as someone with medically controlled temporal lobe epilepsy, is that someone who is actively having petit mal shouldn’t really be belaying.
Before I was diagnosed, my petit mal used to cripple me temporarily, so much so that they would sometimes bring me to my knees.
Pre-medication, my scariest moment was behind the wheel of a car when, for a few seconds, I completely forgot how to drive. That was very, very, scary.
So, my take away would be to get their seizures well under control before belaying anyone, irrespective of whatever clever rope work you might have set up.
Post edited at 16:50