One day, Deidara decided he was going to go to the zoo. He brought Tobi, Sasori, and Hidan. Hidan spent the entire time swearing at the lions with things like 'YOU DON'T KNOW ME' and 'YOU DON'T LOOK SO FUCKIN' TOUGH'. Tobi spent the whole time in the penguin exhibit. Not because he wanted to, but because Sasori pushed him in.
Deidara got lost in the Nocturnal Animals Exhibit, and Sasori simply left him there. Why? Because he had better things to do then lead around a blonde (who had poor eyesight to begin with) with one eye… and he wanted to see the insect exhibit. Insects were scorpions… right? And since he was named after them… well… maybe he could talk to them. Kind of like how Harry Potter can talk to snakes.
In the end, Sasori got arrested for breaking the Scorpion exhibit, a Security guard helped Deidara out of the Nocturnal Animals Exhibit (and shortly thereafter he, too, was kicked out), Hidan was kidnapped by someone in a white van who claimed to have Candy, and Tobi lived the rest of his life as a penguin.
And Sai made fun of Naruto's penis size all the way back in Konoha.
The End