So here it goes.
Description says that:
The arcanist can expend 1 point from her arcane reservoir to create a dimensional crack that she can step through to reach another location. This ability is used as part of a move action or withdraw action, allowing her to move up to 10 feet per arcanist level to any location she can see. This counts as 5 feet of movement. She can only use this ability once per round. She does not provoke attacks of opportunity when moving in this way, but any other movement she attempts as part of her move action provokes as normal.
Here's what is not specified (and what causes my GM to question my way of using this skill):
a) If I can use it anytime movement action is possible can I use it while sitting (to teleport from chair to chair for example) or when lying on the ground?
b) Can I decide whether DS is first or last part of my movement? So for example use it to escape melee combat (avoid AoO) and teleport behind my team? Or do I have to do other movement first (thus inducing AoO) and DS last?
c) Can I open the crack below me so I just fall into it?
d) Can DS be the only movement that I make?
DISCLAIMER: I'm only interested in RAW answers. I'm not interested in house-rules or opinions.