Beach days are the best! It's nothing but taking in the sun, splashing around in the water, and digging six-foot pits in the sand. Um, huh? While I'm pretty sure most people don't spend their time at the beach digging massive trenches in the sand—what are you, digging to China?—to each his own. But if you happen to be the sort of person who enjoys this activity, please know that these holes are extremely dangerous and may collapse in on you, as 17-year-old Orange County resident Matt Mina will tell you.