Hiya,
I would say this is normal. (I hope so seeing as it happens to me sometimes). Sleeping off the effects of a seizure sometimes leaves me feeling like iv'e eaten a tube of blue smarties! (Especially if I have been given a med such as Diazepam). Seizures affect different people in different ways so it may not be normal for everyone, but it is certainly not abnormal.
Hope this answers your question
Darren