When can dispersion be activated?

[jhemfl]

Have any of you beta users been able to see when Dispersion can be activated?

What I mean is, Pally bubble can be activated at any time (like bubble out of a sheep). Is Dispersion this way too? I mean can I disperse in the middle of a Rogue opener or am I going to have to wait until I have control of my character to activate it.

[Elriniel]

Can be activated when you want, atleast i think i activated it when i got stunned by some mobs.. It is also a physical buff so cant be dispelled. But it silences you for the duration it's up.

[jhemfl]

Can be activated when you want, atleast i think i activated it when i got stunned by some mobs.. It is also a physical buff so cant be dispelled. But it silences you for the duration it's up.

Thats pretty sweet, so basically we can negate a rogues 1st opener.