You'll have to reset the map by entering the lobby or changing to Splatsville until you see the Jellyfish in that spot (It can be on Callie's side too). Try positioning yourself between the Jellyfish and the truck and keep pushing into both. It might take some time but eventually you'll pass through, after that go to the front of the truck and carefully jump onto it, it might push you out and you'll have to try again. If you're lucky you'll clip ontop of the truck, from there you can jump up to the idols and take pictures like in the thumbnail
Watch video Splatoon 3- Getting up Marie's truck (glitch), read description online without registration, duration hours minute second in high quality. This video was added by user Agent 4 01 April 2023, don't forget to share it with your friends and acquaintances, it has been viewed on our site 7,613 once and liked it 164 people.