Shake Weight: amazing workout or completely inappropriate?

Need a Thursday afternoon giggle?

Sure, this might be childish. But seriously, "the rapid, short, and powerful thrust of the shake weight"...will crack you up. Click through for the full clip, embedded on the site:

• "You'll feel the burn instantly."
• "It's an all over workout, with your breathing, and your arms pumping..."
  
• "I haven't had a pump like this in a long time."
  
• "The shake weight is built to last."