The road rage incident was filmed by a French woman living in the UK - who had only been driving in the country for two weeks.
Footage which she posted online shows the male driver approaching a roundabout at the same time as her and the pair almost colliding on Bushey Mill Lane in Watford.
Then, the man returns to his car but instead of ending the frenzied road rage, retrieves the coffee.
Pointing again at the woman driver he rages towards to car and sends the coffee cup crashing into the windscreen, while the dashcam is rolling, recording the woman shouting 'no, no, no' and beeping her horn.
He stamps down on the bonnet again, shouting the whole time.
The stunned female driver is heard saying: 'What the f***?'
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