Vanishing?

[Dawn2335]

I see people all the time vanishing into thin air with a puff of smoke. How do you do that? Do you need to be like, a mage or something?

[prothena]

Rogues have the ability to turn 'invisible' but if you log off you also seem to disappear like that

[allcode17]

Thats one of the rogue chicken ability, i admit it you can kill players effordless acompanied by that skill, i got a phobia in going alone in behind enemy line in sengoila because of that kind of rogue ability.
Going alone in sengolia as a priest charging crystal or chasing some half dead player is one of the stvpidest strategy to gain silver badge or killing steak, expect being stab at the back.

[LadyJemma]

Probably someone using a portal scroll

[DrewC]

Could also be changing instances as well but with the puff of smoke - more likely what others have mentioned already - a rogue going in stealth.