You can remove the spiralling effect when you hover your cursor over the image. It will keep the enlarge effect, but take out the spiralling effect.
1) Download this base.js file: base – no spiral
2) Unzip the file and the base.js doc will be located inside
3) Click to open your Weebly Editor and click on “design” and into “edit html/css”
4) Click on “add new file(s)” to upload the base.js file you download in step 1
5) Save your change and publish your site