Can someone do me the honor of putting this man
and the another dancing gif together to make him look like he got scared of the second gif.
i have tried and for some reason can't get the second gif to get in the picture as well
I used Adobe Flash, but only because it's what I'm used to. I wouldn't recommend using it for this kind of things since it's more vector graphics oriented.
Gimp has little use in terms of animation so you're better off trying with a video editing program, something like Sony Vegas but that could be an overkill.