David Letterman apparently doesn't know that much about Twitter. He even thought it was a paid service, until Tuesday night.
Kevin Spacey popped by to educate Letterman on all things Twitter. He even whipped out his Blackberry and attempted to give Dave a live demo, posting a tweet from The Late Show stage.
David Letterman was not convinced.
After the demo, he quipped:
"You know what this reminds me of? Oh yeah, a waste of time."
You know, he might actually be on to something. Here's the video.
Kevin Spacey on David Letterman
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