A youth confronted an elderly man on a stairwell. "I told you I'd kill you if I saw you again, you old fart." The old man didn't reply.
"Now I'm gonna kick your fuc-" "You were saying?"
"What just happened?!" said the youth. "That's a hypodermic needle in your arm, it contained Zystrinex. You'll be dead in five minutes."
"Ha! By then, I will have killed you." "You can't, the Zystrinex is already paralysing your major muscle groups."
"You fuckin' old bastard!" "Youth is wasted on the young," the old man muttered, as he made his way to his flat.