What gameplay feature is this bug affecting?
My home page

What's the issue? Please include any error messages you receive and as much detail as possible.
I had added a GIF to my home page and the one head that looks like its laughing is suppose to be bobbing up and down but It does nothing

Any links relating to this bug? For example, if a particular lion is bugging, what is the link to that lion?
no

Any screenshots you can provide us with?
ok here's the link to the page I got the picture from
https://knowyourmeme.com/photos/1506354-godzilla

Please provide us with step by step explanation how this bug happened so we can attempt to replicate it. If it's complex, please include screenshots where possible:
I have tried many times to get this gif to work but the one head still refuses to move like its supposed to