So I shared my tip with her right at that moment, just like I'm sharing it with you now. To keep your serger from vibrating and boucing on your work table, get two rectangular kitchen sponges and cut them in half so you have four squarish pieces of sponge. Wet the sponges and wring them out until they're dry. Place one piece of sponge under each corner of the serger machine. The sponges will cushion the vibrations and keep your machine steady. No more bouncing!
This is a simple but effective tip for keeping a serger steady. It can also be used to steady other types of machines, including your everyday sewing machine.