Prosecutor Neil King told the court Ashley Gill-Webb threw a bottle in the hushed stadium just as the race was about to get under way:
He threw a green Heineken bottle in a lobbing motion that was captured on CCTV.
This bottle landed extremely close to the athletes and it's probably luck rather than Mr Gill-Webb's judgment that it did not do anything far more serious.
More top news
A minute's silence was 'important' - to pay respects and offer tributes to victims, the chairman of the Finsbury Park mosque says.
A woman soldier has spoken of her immense pride at becoming the first female to command troops guarding the Queen at Buckingham Palace
A minute's silence is being observed at midday around Britain to remember the victims of the van attack near Finsbury Park Mosque last week.