Sometimes, in WoW, just like in anything else, you might get into a state of “baaaaûûûûm”, you, know, if you do a lot of repetitive actions, then you get the combo in your fingers which just run on the keyboard and you think of something else while killing, gathering arrows or any other stupid thing.
I remember once, I was boosting a friend in Wailing Caverns with my Blood-Elf death knight. We were on our way out and I was just chain-killing the dinosaures on our way out: Tab -Icy Touch – Tab – Icy Touch – Tab – Icy Touch (the very dramatic sound of a Night Elf hunter dying). In my mantra I reacted too slowly and ganked a poor hunter surely going after the skinning, I apologized but… erh… It was kind of late…