Cool Trick Makes Water Appear to Defy Gravity

Here's a great way to have some fun, (and maybe even learn something), while you're stuck inside on a hot summer day.

What I like about this simple experiment is it uses basic household items and it's easy enough even your kids or grand kids can perform this really cool trick.

The question is, how does the water flow through the handkerchief and into the glass when being poured, but stays in the glass when turned upside down?