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.
Glen Maye requisition meeting scheduled
A requisition meeting will be held in Glen Maye next month.
Political satire is coming to the Gaiety Theatre in Douglas next week, just in time to poke fun at the general election.
Viking longboat races today
Viking races will finally get underway in Peel today - after a six-week delay.
Postal vote applications have to be in soon
Living far away but want to cast your vote in September's election? Time's running out!
Mum launches petition over university support
A petition's been launched calling on government to provide more support for Manx university students.
Bus services north and south face disruption later
Bus Vannin says a number of its services may face disruption this evening.
Wildlife Trust unveils woodland plans
The Manx Wildlife Trust has submitted a planning application for a new woodland in the northeast of the Island.
Deadline looms for by-election nominations
Time's running out to get your forms filled in if you'd like to stand as a commissioner in Marown.
