Making Animated GIFs.

The button you mentioned doesn't seem to exist on my keyboard, though I use a laptop, which may be why.  I can give the free version of GameMaker I found a try, but I'm anything but computer savvy, so the learning curve is liable to be fairly steep.

The scene in question is from an old cartoon - originally from Russia I believe - called "The Fabulous Adventures of Baron Munchausen" (not to be confused with the live-action Terry Gilliam film).  It features one of the film's characters, a rotund, slightly bumbling man named Hurricane, using his signature power - his hurricane-force breath.  His inhalation is a drawn-out process, during which his body inflates like a balloon, swelling to several times it's normal size and bursting several of the buttons on his shirt in the process. 

The scene was one of the very first examples of inflation that I encountered as a child, and I credit it - along with several other cartoons and storybooks - with helping to plant the seeds of what would eventually become my fetish.  The film itself is pretty obscure and virtually impossible to find nowadays - most of the clips that were on youtube have since been removed, save for one brief, French-language clip, which contains the aformentioned scene.  I was able to save a copy of the clip to my hard drive, so even if the video vanishes, I have a copy that I can (hopefully) use to produce a gif.

Here's a screencap from the inflation scene itself, just in case people were curious:

Thanks.  I'll see if I can separate the inflation sequence itself from the rest of the video and gif it using the converter.  I'm not sure how to isolate the sequence itself - or if I can using the software on my computer - but I'll see what I can do.

I'll keep you posted.