Yamaken is currently pursuing Haru's girlfriend. Having grown up with Haru, and being on the receiving end of much physical violence from him recently, Yamaken knows Haru doesn't lie, and can back up all of his threats. Just in the past week, Haru almost pushed him off a fire escape. So how does he respond when Haru threatens to rip off all his limbs?
Yamaken: (kicks him in the leg) That was a lame threat. (drives off)