If you ever notice a weird bubble popping up on your lawn… whatever you do, don’t jump on it. I know it looks tempting—like a giant waterbed hiding under the grass. But the moment you step on it, boom! It can burst and send water flooding across your yard. These are called lawn bubbles. They happen when rainwater gets trapped underneath the turf. Leave it alone too long, and your grass could be ruined. The good news?