Dutch judoka Edith Bosch said she confronted Ashley Gill-Webb, 54, after he threw the bottle onto the track and said: “Dude, are you crazy?”
Mr Gill-Webb, of South Milford, North Yorkshire, was arrested at the Olympic Stadium on August 5 and charged with two public order offences.
Mr Gill-Webb, who was found with no ticket to the Olympic Games, has denied using threatening words or behaviour with intent to cause harassment, alarm or distress.
Prosecutor Neil King told the court it had been a matter of luck that nobody was seriously hurt but accepted that Mr Gill-Webb “was unwell at the time” the incident took place.
Mr King said: “The shouting and jostling had already alarmed and disrupted those around him but throwing the bottle was a step even further.”
Mr Gill-Webb’s DNA was found on the bottle and CCTV footage showed him throwing the bottle onto the track.
Security guard Robert Spears said he was afraid Mr Gill-Webb would disrupt the race and that at no point did Mr Gill-Webb deny what he had done but demanded to know who had won the race.
The trial continues.
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