Beware of the "R" key while waiting to rush in a group or just talking... if you press "R" this will make your character run ahead. I went into the options menu and changed this running key away from "R" to another since it is so near the keys we use the most playing, it's so easy to hit it and then watch your charcter run away into trouble. By the way hitting it again will stop it.... but by this time it may be too late . . .

as I have found out the hard way. . .