(Please click through to Think Geek. They might be having a sale!)
When you're at King's Cross Station, preparing to board the Hogwarts Express, you have to walk STRAIGHT into a wall to get to Platform 9 3/4. If you hesitate, you'll just smash into the bricks and have a large knot on your head for your trouble.Obviously this can be disconcerting for first-years, so they're advised to make a run for it, and hope there are no house-elves nearby that were up to no good. Celebrate the secrets of Platform 9 3/4 with this new Harry Potter Hogwarts Spinner Mug...