Hi Blewitt,
A Deja vu seizure is also known as a simple partial seizure or aura seizure where a person can see colors, get a nervous feeling in their stomach, smell odd odours, like something burning, natural gas or other wierd odours. Sometimes a person may hear words being repeated over and over again and it's all a hallucination but the person is aware of what's going on. Sometimes a deja vu seizure can lead into an absence (petit mal) or complex partial seizure for some people. This is what happens to me but my Epileptologist (Dr. specializing in epilepsy) taught me back in the 1970's that the moment I start to see colors, or get a nervous feeling in my stomach to tighten up all the muscles in my body and make my hands into tight fists for a few seconds by doing this it helps stop the seizure and it won't lead into a absence or complex partial seizure. For more detail check out the following websites
http://www.emedicine.com/neuro/index.shtml#seizures
www.epilepsy.com
Read about simple partial seizures. Here's wishing you well and May God Bless You!

Sue