How to blow a bubble inside of another bubble?

Before I tell you hot to blow a bubble inside of another bubble, I am assuming that you know how to make a single bubble without any trouble.Here we go:1. Use at least a couple of pieces of bubble gum2. Chew the gum until you feel it smoothly in your mouth and without any “crumbs”.3. Start blowing a bubble as you would normally do.4. Seal the bubble with your lips.5. Carefully, start making the second bubble and blow.Just practice and try using different brands of bubble gum to see which one works best. After a while maybe you will end up blowing multiple bubbles inside of the first bubble like the following video shows: