This stunt has lots going on: air pressure, a satisfying 'whoosh' noise, a high speed departure and a good soaking if you are standing close. It's classic science that's fun to do as a family or a ...

Of course, a wipe with a finger will help clear your vision but if the roads are dirty or salty, this can actually make things worse. A water-repellent spray applied to the outside of the visor ...