"My very first thoughts were 'my gosh, I hope that horse is well behaved. I was thinking of the elderly and kids," she said.
However, she said there was no cause for concern.
"The horse and the rider seemed calm. The two young girls seemed very amused, it appeared to me that those young girls knew him. The rider actually asked me if I would like to see him make his horse raise his front legs," she said.
She was surprised to see the video getting so much attention on Facebook, where it had more than 12,000 views in less than 24 hours.
"That's the life," one person commented.
"That's how we all should get around, it'll save our environment and planet from all the pollution of gas etc," someone else said.
"Beautiful, love this," another person said.
Labour MP Kiri Allan also shared the video, saying: "Just another day in Kopeopeo. My office is just around the corner - feel free to drop in - you can park your horse up outside the office."