Ms Eavestaff was uninjured and, despite her ordeal, managed to keep her wits.
"They started backing out and I took their number plate straight away," she said.
"A guy - I think he was the driver - came in and asked if I was okay, and I said no I wasn't."
Police say two men - believed to be in their early 20s - were spoken to at the scene and taken back to the station.
Mr Yearbury said the pair were "very drunk" and both recorded breath-alcohol readings more than 2.5 times the limit. He says the owner of the car claimed that while he was getting petrol from a station nearby, someone had taken off in his car - a Ford Laser - and crashed it.
"There's a few doubts over that story," Mr Yearbury said.
Police are expecting to review CCTV footage from the 24-hour Mobil service station on Great South Rd today, which Mr Yearbury says will determine "whether or not his story is true".
"You don't expect something like this. It was just the fright of it all," Ms Eavestaff said. "They usually hoon out of this petrol station here, but they weren't hooning ... they just seemed to drive straight in."