I've managed to get myself stuck in the geometry of a wall. I can't jump or walk or dodge out it seems. In most other MMO's I've played, /Stuck, or /Unstuck or some variant thereof can be used to rectify such a situation, however, nothing I can seem to think of is working in GW2.
Tantalizingly, /stuck doesn't seem to produce an 'Unknown command' error - but it also doesn't do anything.
Also, I am an idiot with no money and cannot use a waypoint.