On a similar note, when soloing as thf/nin, sometimes when I change gear while a monster's attack animation is going off on me right after I've shot a bolt, I will start singing for a couple seconds before I disappear. It's really weird.
Highlights of that farming session: 358 Raging Fists. Guarding a hit, laffo 111 skill. Higher than my shield and parry on BST, sadly. Not by much though. Tried to fire off a 300% one, but missed two hits. Well, what do you expect from 127 skill and 55 Equipment Accuracy against low60's mobs, bullseyes every time?