Once when short on ideas for prank phone calls, my friends and I called a matress company and claimed that we had a bloodstain on a mattress we purchased from them. We inquired about removing such a stain, and the representative instructed us to use hydrogen peroxide to remove the stain. We then called back a few moments later, and after reaching the same representative, asked how we should go about removing a hyrdogen peroxide stain. He was not pleased.