The prankster, who is also known for performing parkour stunts and free climbing dangerous structures, wrote online: ‘I can’t believe we got away with this!’
In the video, he says: ‘Me, Ben and Wilson signed up for a week’s trial at the Quays Swimming Centre.
‘Our plan is we’re going to try to hide in the flume and then when this place closes we’re going to explore.’
A shocking video has been released showing an Internet prankster running around a swimming centre after closing hours after hiding in a flume with his friends.
A video uploaded yesterday by YouTube personality Ally Law, 20, from Southampton, shows three friends hanging around the Quays Swimming Centre at night.
The trio can then be seen rushing into the flume before stopping halfway down.
Their plan was almost ruined when two suspicious employees checked the water slide and even tried to flush them out.
A shocking video has been released showing an Internet prankster running around a swimming centre after closing hours after hiding in a flume with his friends. Pictured, prankster Ally Law (right)
But lucky for the gang, the employees found nothing after an hour and a half of searching and they were free to explore the facility.
Ally and his friends ran around the swimming centre, playing with the inflatables and shooting down the slides.
Incredibly, they even managed to fool a hapless security guard who found them by telling him they had permission to be in the swimming centre after closing time.
A video uploaded yesterday by online prankster Ally Law, 20, from Southampton, shows the trio hanging around the Quays Swimming Centre at nigh
At the end of the clip, they ultimately made their escape and ran out of the building.
In a statement, Ally told MailOnline: ‘We’re just having fun, we’re not harming anybody! ;)’
The video, which has been viewed nearly 30,000 times since being uploaded to YouTube, has attracted many comments from viewers.
One viewer said: ‘Bro this was so sick! Smile on my face the whole way through man! Absolute madness!!’
Another viewer said: ‘I work at a pool/leisure centre. The workers should have checked the tube until they met in the middle, or had one going from top to bottom.’
Incredibly, they even managed to fool a hapless security guard who found them by telling him they had permission to be in the swimming centre after closing time
This is not the first time the Internet prankster has committed a risky stunt.
In June, Ally Law clambered to the highest point of Blackpool’s Big One rollercoaster – 235ft in the air – after it shut for the day.
And in April, he shared footage of a daring stunt – filmed with a GoPro – which shows him at the top of a skyscraper in Melbourne.
A spokesman for Active Nation, which operates the swimming centre, told MailOnline: ‘Three men were found trespassing at the Quays Swimming and Diving Centre in the early hours of 5th October 2017.
‘In setting off security alarms, external security staff were alerted, attended the venue and challenged the intruders.
‘The men left the building before they could be escorted from the premises.’