I've made use of Dynamic Drive's Shake Image Script to make the images, avatar icons and activity icons on my Moodle 1.9.15+ site go all wiggly. This is my innovation to make the Moodle interface more interesting and visceral.
If you move your mouse cursor over your avatar's icon, it will come alive...I mean, wiggle.
The window below is LIVE. Do a mouseover on any one of the blue round icons.
See what I mean? Good.
Below is a screenshot not a live window. Just in case you didn't know.