You might be familiar with my avatar and the previous avatar, both of which make use of a neat effect. Pretty much, the screen falls and melts into a puddle. If you want to give it a try, here it is, the program I have used for these effects
I tweaked it a little, so here is the setup:
The picture to liquefy is in Pic1. If Pic1 does not exist or is in archive, the graph screen is used instead. A horizontal line on the bottom row of pixels is drawn as a barrier. When converting the screen to particles, all of your remaining RAM is used. If you have less than 775 bytes of RAM left, though, it will not create a var and it uses AppBackUpScreen instead (holds 366 particles).
Press CLEAR to exit. Don't worry, you get your RAM back
If you have 12106 bytes of RAM left, you can convert the whole screen if it was all black. My logo didn't even use the 2048 byte buffer I assigned originally, though