The perfect way to make you go down under

The tingling spreads to your feet, and your shoes start to feel very tight. The pain grows until huge kangaroo feet burst out of them.

You stare at them and wriggle your toes - and then your pants rip apart as your legs become roo legs to match your feet, and you have a tail too.

The upper part of you remains human, but as you stare at your roo legs you see a pouch - and remember that only female roos have pouches...