Park Street in Bristol has been transformed into an enormous water slide, and a huge crowd turned out to watch hundreds of lucky people slide down it in the sunshine.
The slide was made of hay bales, covered in plastic sheets, with lots of water, and washing up liquid poured on top to help it become slippery.
360 people were selected from 100,000 applicants and began riding the slide from 11 am this morning. Among those was ITV News weatherman Alex Beresford, who went head-first down the 90 metre slide dressed as a penguin.
Organiser Luke Jerram told the BBC:
We've got about 300 or 400 hay bales all in a line. It's an extraordinary site.
I wanted to close a road. If you look at photographs in the 1900s you see these beautiful empty streets with all the kids playing out.
It's an extraordinary thing and all that has been taken away. I'm happy to take over a street, and this slide is an architectural intervention really.