Seizure!

This morning,I was awakened around 6am,by my little male boston terrior kicking me. At first I thought he was "chasing rabbits" but when I flipped backed the covers he was up on his stomach,looking like he had just stepped off a tilt-a-whirl. I grabbed him up to check him out and noticed he had wet the bed,he didn't seem to be aware and he was holding his legs out stiff. As I went to take him out to the dog run,he lost his bowls and I truely thought he was dying. I set him on the ground,he was wobbley and went around in a circle. I ran to get my husband and by the time we got back,he was acting fairly normal if not just a wee bit still wobbly.It's almost 8am now and he is back to normal.He's about 6-7 yrs.old,we had him about 5-6 yrs. heriting him and his mate from hub's neices.He's very tiny probably not even 10lbs but has always been healthy. I can't imagine what would cause him to,out of the blue have a seizure. My husband's cousin was over last night w/ his kids(I wasn't here).Hub's said he finally had to tell the 11 yr old to go outside because he wouldn't leave the dogs alone and had them in an uproar so I'm wondering if he could have cause Scooby to smack his head on a piece of furniture,wall,doorframe or other while he was was chasing them around.

We're on a fixed income and won't see our SS for another 3 weeks and our vet works on a cash bases only.