from Boulder's Craigslist:
"The interior frame of this sofa is some kind of resin so it weighs very little. Pier 1 says they dropped one out of a second-story window to test it but we didn't try that with ours. Also, please don't burn this sofa during a riot since the resin might produce toxic vapors. "
Since people with couches in their homes are 1) involved in riots frequently and 2) burn their couches during said riots. Thanks for the warning.
Actually, this struck me as a very "boulder"ish kind of statement. Always aware of the environment there!