Up to 5,000 thrill-seekers will hit speeds of 40MPH on Europe's tallest inflatable slide when the world's biggest inflatable obstacle course comes to Norfolk for the first time this year.
The five-storey-high, 200ft-long 'Thriller' will be one of ten obstacles to conquer at Gung-Ho! Seriously Fun 5k at Earlham Park in Norwich, on Saturday, September 16.
The huge obstacles will be filled with enough air to pump up more than 100m footballs, making it the biggest course of its kind anywhere on the planet.
More than 80,000 people took on Gung-Ho!'s 13 events across the UK in 2016, and now the brains behind the event, Cbeebies presenter Alex Winters, can't wait to bring the fun to East Anglia.
He said: 'I am so excited to be bringing Gung-Ho! to Norfolk for the first time – it is a place I have always thought would suit the event, and finally we have managed to get ourselves there.
'We have visited some amazing places across the UK and seen how Gung-Ho! they can go – now we'll find out just how Gung-Ho! Norfolk – and in particular Norwich – is.
'I have no doubt the city will be well up for what is a unique, fun-filled event for people of all ages. It is a chance for adults to feel like kids again, and kids to show the adults what they are made of.'
Mr Winters came up with the idea of an inflatable obstacle course in 2014 while sat in front of the TV watching Ninja Warrior with his three children.
This year, Norwich is the thirteenth stop on an fourteen-date tour of the UK, with obstacles including a huge inflatable ball-pit, climbing wall and foam-filled labyrinth, as well as huge vertical drops and an inflatable 'gauntlet' set to feature.
Mr Winters added: 'We have learned a lot from our 2016 tour, and have added some incredible obstacles for 2017 and made a few tweaks here and there to make the Gung-Ho! experience even more exciting and memorable than ever.
'Our Manchester event was the wettest we have had, and we noticed a soaking wet Thriller made things event more exciting for our runners as they zipped down at high speed, so now we have having a watery Thriller at every event.
'We have really turned things up a notch for 2017, and can't wait to give everyone a taste of it.'
With many runners taking part for charity in 2016, thousands of pounds are expected to be raised for good causes this time around.
Participants can go Gung-Ho! in aid of the race's national charity partner BBC Children in Need, who are offering discounted tickets and a free t-shirt to those who run as part of Team Pudsey, via www.bbc.co.uk/Pudsey.
Runners, who must be at least 4ft tall, receive a free bib with race number, Gung-Ho! t-shirt and headband, while any spectators can attend for free.
Tickets and more information are available at www.begung-ho.co.uk. Check out Gung-Ho! updates by searching 'Gung-Ho! on Facebook and on Twitter, at @begungho.
Tickets cost £31 until Monday, June 12, when they go up in price.
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