This isn't Country Kitchen Buffet*

I think it's about time to take away Great Grandpa's car keys.

A 100-year-old Japanese man who was arrested after his car hit an umbrella held by a child said driving was his ticket to avoiding senility.

"Driving helps me from going senile because it keeps me alert," police in Sendai, northern Japan, quoted the driver, Masaru Hori, as saying.

The incident marked the second time Hori had been caught for driving without a license since it was revoked after a hit-and-run accident in August, police said. He was also involved in a similar accident last month, they said.

Um, maybe it's just me, but it doesn't exactly sound like the whole staying alert thing is really working out.

*The title refers to this South Park episode.