Smart Cars are small enough that they confuse some lions into thinking they might be. A BBC news story says there have been reports of lions chasing after the vehicles in Knowsley Safari Park in Merseyside, England.
Mr Ross said: "The lions will take an interest in peculiarities on cars and we always keep a close eye on the cars coming in.
"With Smart cars and sometimes Mini Coopers the lions definitely raise an eyebrow. It sparks their interest because of their size.
"We had an incident of two ladies in a car being chased by lionesses.
"It must have been quite frightening for them, but we always have staff in a vehicle by the lion enclosure to deal with any problems."
In earlier post we mentioned that a company called Zap plans to sell at least 15,000 of the tiny Smart Cars here in the U.S.