It all depends on the type of seizure. Grand-Mal (Tonic-Clonic) have those around you get you away from closed-in areas so you don't hit anything & get injured. If it's Absence (Petit Mal), as w/ myself, you may not know it's happening until you start noticing gaps in time missing. The only thing you can do is alert those around you that you're epileptic, & tell them if you FREEZE in place in a prolonged catatonic state to let you know. If it's a seizure or you dosing off bc of lack of sleep or something, you'll know but you know you have a friend that cares about you. But that can be a 2-edge sword, if you have GOOD people around you it is a plus & they're there for you no matter what. If not as I had a couple years ago at work I started to lose gaps of time (I would start working @ say 10am, then all of the sudden it was 10:30 and nothing was accomplished w/ no recollection of what happened during that time. After that happening for a while I put 2 & 2 together & realized what was happening. But during the period when it occurred I had a few meeting w/ management regarding the project & apparently became extremely argumentative w/ those in the meeting. Even though I determined the cause & went to seizure monitoring for 2 wks. when I returned to work I was told I was performing as a Sr. Architect "should" & was immediately terminated. At Purina on the other hand (back in 2012), I had a major Grand Mal. My team & those at the company were aware of it & even called literally from half way around the world to see if I was okay & was there anything they could do. When I was in HS I had petit mal for approx. 30 days which crucified my GPA & the teachers wouldn't bend even w/ Doctors declarations of what was happening. In college I would have issues on occasion during exams. Needless to say the professors wanted to keep standards up.
With Myoclonic, try to sit down until it passes, or in the case when I was getting out of the hot tub at the gym my muscles started twitching. All I could do is grab onto the rail & let the life guards what was happening. I ended up sitting on the side of the pool & drank water until everything passed.
I could go on RE: all the other types of seizures, as I've run the gambit.
I know I probably messed everyone up even more, but it always depends on the type, whether you have an aura, but the question is what to do if you are experiencing one. But in ALL cases, let those around you know that it may be a possibility. I've been under control most of my life, but God has a "tendency" to let me know I really have NO control over my life, but He does in all things.
Thanks be to God, and that Christ cared enough to come, die, & overcome death that we don't have to worry about who has control, just pray that He take it for you.
Have a Blessed 4th