Once Walsh obliged, Scott informed him "there was a crayfish" in the water with them, only for Tindall to then sneak up behind him and give him a fright.
Walsh, naturally, jumped out of his skin, but it wasn't the jokey moment that got viewers laughing – it was the Royal family member's choice in swimwear.
Hosts Ant and Dec later mocked the sheer size of the tiny trunks themselves, joking he'd taken his wife Zara Phillips' swimmers by accident.
"Did… did Mike just go in the pool naked?" one fan wrote.
Another shared a GIF of Friends character Phoebe Buffet screaming out "my eyes, my eyes!" in horror.
Another was enjoying the view, and wrote: "Me @ Mike Tindall: "Hell....oh" once we see them lovely swimming briefs"
"Mike in his trunks! Now this is more like it!" added a third.
Tindall had quite the rollercoaster on Sunday night's episode, after he was voted by the public to be one of two potential leaders of camp.
Despite saying he would "never live it down back home" if he lost to the former health secretary, Hancock and Douglas emerged victorious, and are now in charge of how the camp's run.
On top of being allowed to sleep in an RV with full beds, the duo have been given comfy chairs and are exempt from helping out around camp.
They have also designated roles around camp to the other campmates, something Boy George has taken particular exception to, after making no secret he was not happy with Hancock's involvement on the show.
On the win, White – who has taken several opportunities to grill Hancock over his role in the Covid pandemic – said of the Tory politician: "I’m super, super proud of Matt for winning one leadership contest."
But Cleaver dubbed the camp "a dictatorship" while Tindall declared: "There’s always time for revolution.”
On their arrival back with their co-stars, several campmates have already said they are on board with overthrowing the Tory MPs newfound position of authority.
I'm A Celebrity airs nightly at 9pm on ITV.
WATCH: Mike Tindall opens up about Zara Phillips giving birth on the bathroom floor