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.
Westmoreland Road Spar's post office to reduce services
From next month only postal services will be available at the Spar on Westmoreland Road in Douglas.
Results see 98% pass rate with majority of GCSE students going to Sixth Form
The government's announced a 98 percent overall pass rate from over 1,000 students who received results for GSCEs and other qualifications today.
7 year old sets the bar high at Douglas gym
A young gym-goer has left her peers amazed after completing a four-minute dead hang.
Ballabeg’s Bigfoot Sunflower Field reopens this weekend
A sunflower field in the south of the Island is ready to open its gates once again this weekend.
Curphey's high street premises up for sale
The premises of a well-known high street shop in Douglas are up for sale.
'Cut the risk – trim your trees' says DOI
The government is reminding landowners to trim their trees, or face being fined up to £5000.
Evri text confirmed a scam
Police say a text scam is currently circulating which impersonates the delivery company Evri.
Onchan Party in the Park on Saturday
Onchan's biggest party is back this weekend - and kids go free!
