SHIPS
'(<a href="http://www.j-archive.com/media/2006-04-07_J_23.jpg" target="_blank">Jimmy of the Clue Crew reports from the Vasa Museum in Stockholm, Sweden.</a>)  The Vasa capsized on its 1628 maiden voyage because tons of stones, used as this, didn't counterweigh the guns, masts, sails, & upper hull'
ballast