Footage is being circulated of an incident where a man crossed the closed MGP course, a matter of seconds before a bike speeds down it.
It happened at St Ninian's, with the man helped to safety through barriers by spectators on the other side of the course by the EVF garage.
Police issued a warning saying it could have ended "horrendously".
They've reminded people of the dangers and said police will work with marshals to prosecute anyone who breaks road closure restrictions.
Fuel price hit may last into winter, says government
The Chief Minister says the government must prepare for the winter when it comes to rising oil prices over the war in the Middle East.
Further temporary speed limits on TT course
There'll be more temporary speed limits and traffic lights on the TT course this week.
Western homes to be without water tomorrow
Homes in Peel may be without water during work tomorrow.
Co-Op ordered to hand over evidence in blind worker's tribunal
Manx Co-operative has been ordered to hand over documents, messages and CCTV footage to a woman who's claiming she was unfairly dismissed and suffered disability discrimination.
Who'll be getting meningitis vaccines?
An MHK has asked the Island's Cabinet Office Minister about meningitis vaccines.
New atlas shows dramatic fall in Island birth rate
Births on the Island have fallen by nearly 45 percent in 15 years.
Autocar lavishes praise on Island's roads
The Island's roads have been praised by a major motoring magazine as some of the best to drive in the British Isles.
Super Unleaded hits almost 165p a litre
A fuel company's revealed the scale of price rises motorists will be facing today.
