I've been spared the violent convulsive seizures, formerly called grand mal. Mine take the form of total black outs, preceded and followed by periods where I become disoriented with slurred speech and loss of balance. I wear a medic alert bracelet so hopefully police or others won't mistake my condition for alcohol or drugs. The seizure itself is no danger to me, my heart won't stop or anything, nor can I swallow my tongue, but I could have a fall or suffer other injury.
Another form it can take is an eyes-open spell called an "absence seizure" where I suddenly just freeze in place. It looks like I'm daydreaming, staring off into space. It most often happens when I'm watching TV, which helps me to know I've had one, when afterwards I realize time has passed and I missed my show. Because otherwise I wouldn't know, it's very subtle and leaves few residuals, just comes & goes. It sounds like the guy featured in this article gets those, too.
Oddly we had a professor in my broadcasting program who got those, especially when he was stressed, also working around TVs and control room equipment. He would just freeze like he was petrified, non-responsive to us students, so we'd leave him in place, but closely guarding him. We knew he would snap out of it in a few minutes, and didn't call for help because he didn't need any and that might have caused him problems with the college admin. We all liked & admired him, didn't want him to lose his position.
Now today I get them myself. But very seldom, my meds work very well. In fact, about the only time I get a seizure is when I forget to take my pills. And then it's usually a very mild one. I've also never had a seizure when driving, although if I admit to any seizure my doctors are supposed to report me to State motor vehicle for a 6-month medical driving suspension. Which can be lifted anytime after a doctor certifies I've been seizure-free for a 6-month period. The weakness with the system is that it relies on self-reporting, or if I should be taken to a hospital for a seizure, which hasn't happened in 10 years.