This is a Durarara! fan fiction.
On a sort of thick, fifteen foot-tall wall in a park in Ikebukuro, Izaya lay down with his hands behind his head demented smirk and all. Oh yes, he was enjoying this. Shizuo was at the bottom of the wall, impossible to get to Izaya from there. Oh, he had already tried MANY times. But even the mighty Shizuo couldn't break down a wall or climb up one so steep and without ledges to grab onto. Izaya knew this well and enjoyed agitating Shizuo further. So there Shizuo sat at the bottom of the wall. Trying to get Izaya to come down, but he wasn't going to do so anytime soon. He was deeply amused by this after all. How did Izaya get up there? That's a mystery.
"You might as well go home Shizu-chan cause I'm not coming down." Izaya called, dropping coins on Shizuo's head. Shizuo's eyebrows twitched and he gritted his teeth as the coins started coming down. After the third coin, he lost it. Shizuo again punched the wall with all his strength. It didn't budge, or crack, or dent. Izaya laughed in the way he does.
"Yes Shizu-chan, amuse me more!" Izaya mocked. Shizuo punched the wall one more time than sat back down.
"You're going to have to come down eventually!" Shizuo growled.
"Well, you could be here forever since you have no job and no life." In a fit of rage, Shizuo went on a frenzy on the wall with no effect on the wall itself. When he stopped, Shizuo was breathing heavily. His fists were full of scratches and the pain was awful but he had already felt that way, the feeling just intensified. Defeated, Shizuo sat back down, his breathing normal. This really could go on a while and most of the time I would jump at the opportunity but I have places to be soon, perhaps I should wrap this up. Izaya thought. Izaya quietly (and like a boss) jumped off the other side of the wall and started to run softly trying to see if he could leave without Shizuo noticing. When Izaya was far out of sight, he screamed, "WELL IT'S BEEN GRAND SHIZU-CHAN BUT I'LL TAKE MY LEAVE NOW!" Then he ran off further. Shizuo was up like a blink of an eye, looking at the top of the wall then looking all around him and the wall. Crap! He got away! Shizuo snapped.