A masked man on a moped tore through Clumber Park and swiped a bicycle from under the noses of riders who had stopped to have a coffee.
A police search ensued, including the helicopter being scrambled, and the bike was later found dumped.
But bike owner Sarah Dolby contacted the Guardian to warn our readers to be extra careful following the scary ordeal.
“Myself and three friends stopped for a coffee at the coffee stop next to the lake on the Hardwick side of Clumber Park,” said Sarah.
“ We propped our bikes up against the tree and were sat on the chairs near by.”
“Two men on a moped - the first wearing a scary mask that had been cut out of a T-shirt - drove through all the tables.”
“They then turned round and the guy on the back leant out and grabbed my bike by the handle bar. They then drove off dragging it.”
“We chased on foot and then my boyfriend and his friend chased on their bikes.”
“The police went out in force and the helicopter was up.”
The incident happened on Sunday 31st May at around 4.30pm.
Sarah said her water bottle and bike computer were found thrown on the floor.
And her bike was hidden in some bushes on the footpath into Manton from Windmill Lane.
She said: “We think people should be aware, as even though we were sat right next to the bikes they still managed to take one.”
Notts Police confirmed they were called to the bicycle theft, that the helicopter was scrambled and the bike later recovered.
A spokesman said investigations were still ongoing to trace the offenders.
If anyone saw anything or has any information on this incident call Notts Police on 101 quoting incident number 707 of 31st May 2014.
The force offered the following advice to bike owners:
• Lock your bike tightly so that it is difficult to move when parked
• Always park your bike where it can be clearly seen, using designated parking areas or secure cycle storage
• Remove any items that can be taken without using tools, like wheels, lights, pump, panniers, seat post and saddle
• Register your bike with www.immobilise.com a national property database where police can reunite stolen items with their rightful owners.