How the hell did he do that? use a bath tub?!


and uh..tye dye is basically dying your clothes or blankets or what ever in different colours with rubber bands or string and making cool patterns.

Urbandictionary.com
a common style of clothing worn by hippies, it can be hand made, by using elastic bands on shirts and then adding random dyes and washing it all together and it makes 'groovy' patterns. Though anyone who wears tye dye now a days probably buys it like that, and might wear it as part of a costume or to be ironic.