just a suggestion:

Lines for climax [between stalker and Guy 1]

Stalker: Anything else you need?
Guy 1: Brandy... but this one taste's weird... [points to drink]
Stalker: Clear your mind up abit eh, it's the usual - no difference.
Guy 1: Damn, a weird sensation is running through me - you better come clean with me!
Stalker: Easy, it's just only the beginning... OF MY REVENGE! [evil laughs]
Guy 1: Face it, you're not going to get away with this - stop. [groans in pain]
Stalker: Go to hell, you think I care?
Guy 1: Hey are you sick? I didn't do anything to offend you!
Stalker: I think you're greatly mistaken. You, KILLED MY SISTER! [from calm at the beginning to hysterical at the words in caps]
Guy 1: Just a minute! I didn't do anything, it was her fault!