My cat Franta does this but he also has seizures sometimes, and he is jumping at me even opening a pouch of food.
I would definately have a word with your vet.
Its always best to check, Franta is not epileptic but its thought he has an abcess on the front of his brain and when it gets big he has seizures. Its effectively a brain infection and when he has seizures I inject him with a very powerful anti biotic that gets into the brain.
His last seizures were in November and has been doing this ever since, he is 17 1/2 yrs.