Ending a Unit Morph?

Is there anyway to prematurly end a unit's morph that a user cant normally cancel? Such as the demon hunters metamorphesis?

With a trigger or JASS function?

While the unit is morphing or to revert back to normal form?

Say, demon hunter is in demon form, has about 1 minute left until he turns back, is there a triggered command to change him back imedaitly?

I'm not sure it is possible in GUI, but in JASS, I think you can use something like this, but I can't guarentee it will work:

    call CasterCastAbility(GetOwningPlayer(GetTriggerUnit()),<Abil Stop Code>,"cast",GetTriggerUnit(),true)

The native is:

native CasterCastAbility takes player owner, integer abilid, string order, widget target, boolean instant returns unit

I think that should work, you just need to have a "morph back" ability and have the unit cast that. If you don't want it to appear, put it in a spellbook and disable it like that.

EDIT: JASS tags were messed up, so I had to use code tags.

EDIT Again: This is part of the CS (caster system) so I don't know if there is another way to do the ability.

Ummm for a simple idea check the monolith of blizzard maps I'm sure I saw a metamorph trigger in there, just play with it a little and I believe you will solve it.