Unless you're talking about slow motion, a real soap bubble basically just disappears. There will be a few little soap particles, but it really just goes POP and is gone.
However, I assume you mean you want it to blow up and disappear outwards. You could use a distort effect, such as Bulge. Coupled with Effect>Transition>Iris Wipe.
You'll need to adjust the parameters of the iris wipe to make it look round (make iris points a higher number), then feather it.
Assuming I assumed the effect you were after correctly, that should do the trick.
- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')
No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.
Re: burst like soap bubble by Bill Kelly on Mar 9, 2010 at 10:32:59 pm
The Scatterize effect may also work for your situation. To make it look good, you would most likely want to introduce a blur on the scatterizing (is that really a word) layer as the scatterizing is taking place, and enable motion blur for the layer and the comp.