Press space, type in text, and watch it spout horrible sounding things that may or may not sound like the word you typed. This was more for fun and experimentation than anything else. That's why it can't make a lot of sounds in the english language because it'd take a more complex program to know how to say 'ooh' or 'the' or 'achoo' and other things properly :P
I put a bad word in to see what happened and to my surprise it pronounced it very well. Probably one of the words it pronounces best.