Arthur Weasley investigated exploding toilets and shrinking keys but he didn't reckon with the likes of us. We Potterheads got a few tricks up our sleeves.

I'm going to put a spell on all the coffee grinders in all the grocery stores on Senior Citizen Discount Tuesdays.

Scenario: A muggle opens a l lb. bag of coffee beans and pours it into the grinder. Then the muggle will put the empty bag under the spout and turn the grinder on. The bag fills, overflows, and the grinder just keeps on pumping out coffee grounds. And Senior muggles come running from all over the store scooping up coffee and putting in their pockets, their handbags and baseball caps. And the coffee grinder grinds on!

Crikey I love a good coffee story.

What magic prank are you going to play on the muggles? Don't worry Arthur Weasley does not read Harry Potter Chat. He doesn't know about muggle computers yet.