I remember about 7 years ago trying to use voice activation software on windows xp (I think, could have been 98 though!), and all my parents could hear from my bedroom was me shouting OPEN thinking the louder I said it the more accurate it must be.
Couldn't help but laugh when I saw this video!
[Video below - you make not see this in a reader]
Originally found here: http://microsoft.blognewschannel.com/archives/2007/06/08/worst-vista-speech-recognition-demo-ever/