"For his amusement John the Terrible used to order a number of people to be sewed up in bear-skins, and then torn to death by bear-hounds. For tearing prisoners to pieces he ordered the tops of several trees to be bent down so that they came together; the limbs of the unfortunate victim were fastened to these tops, each limb to a different tree. When they were thus tied up, the release of the trees performed the work intended by the cruel Czar."
Source: wiktionary