I think my Lucy had a Stroke or a Seizure

[catfamily]

I'm not sure but this afternoon me and Lucy and her sister Penny were on the big bed relaxing with the TV off while I was reading.
I looked up at my Lucy and noticed she was looking odd.I got right up and went close to her,and she was in a daze...dark eyes...slowly moving her head...VERY slow like a slow motion film in slow motion.She was lying on her tummy in her relaxed way but her paws also(front paws)were moving(the hand part)and also in slow motion.It was so strange and I knew it wasn't normal.
Of course my eyes started tearing up so bad...I thought "I" myself was going to have a stroke or heart attack.We are so close...me and Lucy AND her sister Penny.We always relax together.(us 3)
This freaked me out.She's fine now.But I know something happened.Does anyone know what those symptoms are?She eats GREAT food and drinks plenty of water.There is absolutley NO chance of her getting into anything poisoness.I clean this house so that it is very cat safe.I am very distraught although Lucy is fine now.I will call the vet tomorrow because today was a Holiday but if there are any knowledgeable people to give me a cue as to what happened,I'd appreciate it.
Thanks
Carla
This is how we relax together all the time.Me Lucy and Penny(her sister littermate).