Ive done that, and many other marbles, Marbles were made forp laying marbles, Not putting in mouths. Check your mates not standing behind you when you go to serve in tennis (Stitches in eyebrows) Don't think you can ride on paths 15 minutes after learning to ride a bike on grass, I hadnt quite mastered brakes and hit the front of my head on a wall corner by a neighbours gate. Realise that when your on a shitty plastic see-saw that moves round the garden when your on it, can end up in going over to a step.... Glued back of head. Edit: When mashing up mud in your garden, with a garden fork, Know where your feet are and how close the fork is Don't step on bee's with bare feet.