There are lots of things in the world we have to look out for. The "Dumb Ways" song laid it out for us pretty clearly more than 10 years ago. Yet, the Internet seems to find new dangers we should be aware of every other week. This time, we’re featuring submissions from people about the times they messed around and found out. One person online asked: “What, due to experience, do you know not to [mess] with?” And people came prepared with all sorts of stories and practical wisdom, from never engaging in road rage and never bothering a sleeping person to taking good care of your eyes.

Men who say all their exes are crazy.

Intuition. If something feels wrong stop. It doesn't matter if it's stepping out onto a snow-covered slope, pulling up to a sketchy gas station, or putting too small of a

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