Even a Stopped Clock Is Right Twice a Day
A journalist named Shuji Niekawa is beaten up by Shizuo six months ago while trying to research who is the strongest person in Ikebukuro. As he goes around interviewing Simon, Izaya and Celty, Niekawa narrates his feelings on his latest work and the regret of not able to bond with his distant daughter, Haruna. After heading back home from a long day of work, Niekawa is attacked by the slasher who stabs him with a kitchen knife. After he survives the attack with no memory of the incident and awakes in hospital, Niekawa is possessed by the slasher spirit and directed to look for Anri, who was heading back home in episode 14. As he attempts to attack, Kyohei and his gang knock Niekawa down and rescue Anri. However, Niekawa gets back up to attack a second time but is knocked down by Celty on her bike with Shizuo in tow. Upon seeing Shizuo, the demonic spirit in Niekawa professes its love for him. Shizuo is enraged on hearing the slasher's confession and rips out a car door to bludgeon Niekawa.
Aired 23/04/2010EP 15 - Even a Stopped Clock Is Right Twice a Day

Durarara!!
In Tokyo's downtown district of Ikebukuro, amidst many strange rumors and warnings of anonymous gangs and dangerous occupants, one urban legend stands out above the rest—the existence of a headless "Black Rider" who is said to be seen driving a jet-black motorcycle through the city streets.
Ryuugamine Mikado has always longed for the excitement of the city life, and an invitation from a childhood friend convinces him to move to Tokyo. Witnessing the Black Rider on his first day in the city, his wishes already seem to have been granted. But as supernatural events begin to occur, ordinary citizens like himself, along with Ikebukuro's most colorful inhabitants, are mixed up in the commotion breaking out in their city.
(Source: MAL Rewrite)