Hi My Son Is Autistic But Never Has Suffered For

hi my son is autistic but never has suffered for seizures before until recently started to suffer from seizures but only twice in his life of 9 years has he had these.in both situation he has been holding/ in contact with a retractable queue controller in shops and when i removed him / pulled him back away form them he went into a seizure. i have been informed that they have small amounts of static inside of them. this could be a coincidence but seems very wierd to me. is it possible for something like this to cause a child to have a seizure or should i be looking else where for the issue causing it.