In a preview clip of tonight's episode (2 December), the pair can be seen strapped into a giant wheel before being spun upside down through a trough of water and creepy crawlies.
The pair are tasked with picking up red balls in the water and, as they emerge, throwing them into a basketball hoop. The more balls they net, the more stars they get!
Ahead of the trial, called The Deadly Dunker, Ant and Dec ask BBC newsreader Michael and 'Allo 'Allo actress Vicki how they are feeling.
"How do you think we're feeling?!" Michael replies. "We're strapped to a bloody wheel and are going to be rotated through a pond full of evil-looking creatures..."
The pair are given 10 minutes to try and get nine balls into the basket - but will they manage it?
Surprisingly, both Michael and Vicki seem remarkably calm. After the klaxon sounds, Vicki can even be heard saying: "Move over, boys, we're coming through!"
Rather you than us though, guys....
Meanwhile, last night Jimmy Bullard became the first celebrity to leave the jungle. Who goes tonight? You decide!
I'm A Celebrity...Get Me Out Of Here continues on ITV1 tonight
Watch the preview of tonight's trial here: