Scared by Cyclists

So the NY Times has an article on the rise of Cycling and the mental problems that have arisen. Here's one paragraph that defies logic:

“Mention the noon riders to anyone in town and you’ll see the blood pressure go up,” said Susan George, Woodside’s town manager. One day, she said, she rounded a bend and came upon them: “I slammed on the brakes and they swarmed around me, screaming and yelling obscenities. My heart was pounding. It was very scary.”

Scared by cyclists? Is she serious? Exactly WHAT threat did the bikes pose to her? No, seriously. She and her 2 ton vehicle was the threat.