How To Guarantee I Won't Give You Money

[Moozik: Clan of Xymox - No Human Can Drown]

As I'm approaching my car in a shop car park, a bloke on an expensive bike with a rather nice looking backpack rides up to me.

Him: Hey man, I need you to do me a favour.
Me: Er, ok.
Him: You gotta give me $4.25 man. I've got to fucking get out of here. I'm sick of this shit, I gotta go man. I need that fucking bus ticket.
Me: Mate, I don't have to give you...
Him: (interrupting me) And I don't want to hear any of your fucking stories ok, I've heard them all. I just want $4.25 without the fucking stories. I'm so sick of this shit. (proceeds to give me creepy sideways stare - presumably some kind of attempt to intimidate me, but I almost laugh in his face)
Me: (trying to stifle a giggle) That approach work often for you mate? Run along now.

He looked surprised and kept looking back at me as he rode off. Of course I gave him a rather sarcastic wave as I got in my car.