This is the moment firefighters unexpectedly turned up at a backyard waterslide party and blasted the slide with a powerful jet of water from the truck’s hose.br br Tiffany Maillet, 34, was at a neighbour’s house with her five kids when firefighters arrived at the house next door on a call.br br After wrapping up the emergency, one of the firefighters strolled over and made an unexpected offer.br br Moments later, a firetruck pulled up and four firefighters unleashed a jet of water from the truck’s hose onto the slide, sending the five kids squealing with joy as they slipped and slid down the super-soaked slope.