forked lightning bug

Rokzrmah attacked my groupmate who fled and I cast forked lightning. It hit Rokzrmah, but also hit me. I have never heard of forked lightning hitting it's caster or groupmates before. <178HP(40%) 791MN(95%) 368MV 5380TNL 8 AM civilized> A tortoise pulls her head and legs into her armored shell. Rokzrmah has a few scratches. <178HP(40%) 791MN(95%) 368MV 5380TNL 8 AM civilized> c forked A bolt of forked lightning shoots forth from your hands! Your forked lightning DISMEMBERS Rokzrmah! Your forked lightning === OBLITERATES === you! You are mortally wounded, and will die soon, if not aided.