Vampiric touch

82%hp 72%m 72%mv -outdoor- [11 PM] 9873tnl wilderness > s Approaching the Mountains [Exits: north east south] (Pink Aura) Tintalle is mortally wounded. 82%hp 65%m 71%mv -outdoor- [11 PM] 9873tnl wilderness > c 'vampiric touch' tin Tintalle yells 'Die, Nierth, you sorcerous dog!' Your deathly touch MASSACRES Tintalle! Tintalle is DEAD!! You land the killing blow against Tintalle. Tintalle's ear is sliced from her dead body. 81%hp 60%m 71%mv -outdoor- [11 PM] 9873tnl wilderness > I just wonder if vampiric touch spell supposed to work like that - seems it leeches negative HP as well (victim was in -hp condition).