Partial Release
  
That embarrassing situation your masseuse was kind enough not to talk about afterwards.
Also, a situation that comes up in mortgage deals.
You buy a property that includes a few acres of land, a house, and a small, ramshackle shack in the woods. One day, a long-bearded man in a floppy prospector's hat shows up at your door. He wants to buy the shack to set up his retirement homestead. He makes a good price, but the shack is part of your overall mortgage. It's part of the collateral you used to secure the loan that let you buy the property. You can't just sell it; the bank, through the mortgage, has a lien on the structure.
Time for a partial release. This provision in a mortgage contract allows you to remove part of the collateral from the deal. You have to meet certain criteria (like have sufficient equity built up) and apply for the release through your mortgage lender. But it comes in handy in certain situations, like selling part of the property.