im not sure if my dog had a focal seizure. *a bit of a long story*

little background of my dog
hey, i have a dog named jojo, hes about to turn 10 and hes a black lab. weve had him since a baby and hes never had any issues besides messing up his leg one time when he was 2 years old (just ended up twisting it out something, got fixed and never had any issue) we go to the vet every year and the vet always says hes a one and million dog, hes never sick and hes in great health. jojo is an emotional support animal, i have schizoaffective and i wanted a friend to be around to take care of.
anyways, to the actual event that took place a couple minutes ago. (i dont have video, im sorry, i was frozen in fear. i knew if i moved, i would have panicked and i just wanted to be as calm as i could) i had taken him out for his evening poop around 8:45pm. everything was normal we come back inside and he usually gets his usual carrot after hes done with his poops. i go to get him his carrot and i call his name, he doesnt come, it sorta striked me as odd, but sometimes he does funky things. i come back and start giggling that hes being funky.
when i look, hes just sorta frozen, looking at the kitchen. i ended up calling for my sister to come and she said it was weird, he still just staring at the kitchen, we didnt really do anything, we sorta just sat at the chairs and just watched, my sister suggested that he saw something that spooked him. i said i do see things, but i am schizophrenic so its just hallucinations so its probably not that. he then got down on his stomach and starting shaking, which worries us. i get close to him and started to pet him, telling its okay. in my heart, i felt broken, ive never seen him like this ever. he was shaking for a while then stopped but, didnt get up. he sorta just stayed in the spot. we recently moved his bed to the corner of the living room so i had the idea to move it back to the original spot it was, which is in front of my door. he slowly got up and went onto his bed and just went to sleep. im just worried, im keeping my door open tonight because i want to periodically check up on him.
any ideas what it might be?