Details on this one?
In a nutshell:
English Grand Prix, Nottingham, 1990.
Promoter was John Martin.
Samir was unhappy with his placings and started kicking chairs.
John asked him to stop.
Samir punched him.
Selwyn Cottrell carried Samir off - Selwyn was not someone to mess with :-)
Samir was suspended for the rest of the tour.